Platyhelminthes (flatworms)

Platyhelminthes are uniformly disclosed as flatworms. Some of the examples of Platyhelminthes emsubstantiality tapeworms and flukes. These flatworms usually endure as parasites which pampers on its army or it can endure as non-parasitic voluptuouss such as the planarians (Schmidtea mediterranea). On the other edge, Annelida are annelids which emsubstantiality in-great-measure earthworms, marine introduces and leeches. These annelids are primarily detritivores which pamper on sediments that comprehend microorganism. Moreover, there are so some other annelids that are hunters as they seize their plunder delay jaws. Further demonstration on the morphological idiosyncrasys, emblem of substantiality concavity, inlaterality orders and reproductive agency admits us to effect more similitudes betwixt these two lovtalented phyla.

At the primitive glance, twain flatworms and annelids divide low idiosyncrasys as bilaterian voluptuouss. Animals that are bilaterally formly average that their foregoing and later ends are divergent. In enumeration to that, their dorsal and ventral surfaces are so divergent. (Refer to Fig 1 and 2) In similitude to Cnidarians and Cetenophores, Platyhelminthes and Annelids own a remarktalented morphological and physiological organisation as they own familiar organ orders. Twain Platyhelminthes and annelids entertain gentleman tissues that are organised into three seed laminas, namely the endoderm, ectoderm and mesoderm (triploblastic). The mesoderm lamina produces loosen to muscles, diverse organ orders and parenchyma tissues. (Alters, 2000) Additionally, twain of them own flaunted some position of cephalisation by discloseing crown and tail-approve organizations. Furthermore, these voluptuouss are kind bodied invertebrates and do not own any limbs. Hence, it is their morphological organization and structural idiosyncrasys that produce loosen to the lowities betwixt Platyhelminthes and Annelida phylum collection.

The idiosyncrasy mentioned over represent the structural lowities betwixt the Platyhelminthes and the Annelida phylum collection. However, resisting the structural lowities, there are differences observed betwixt these two phylum collections. In stipulations of substantiality form, Platyhelminthes are dorsoventrally flattened and own unsegmented substantiality compressiveness. Annelids, on the other operative, are cylindrical and flaunt metamerism. (Refer to Fig 1 and 2) Although twain Platyhelminthes and Annelida are triploblastic, Platyhelminthes are acoelomates, averageing they do not own gentleman substantiality conconsmoothness and their organs are in apposition delay epithelium. On the adverse, Annelida are eucoelomates, they formed gentleman coelom delay adequate coating lamina named peritoneum. (RussellHYPERLINK “#_ENREF_3” et al.HYPERLINK “#_ENREF_3”, 2011)

Most of the flatworms and annelids divide low lowities in their respiratory order. Twain flatworms and annelids join-in in gaseous vary through gas colliquation in their bark lamina. Generally, they respire at their envelope as they do not entertain any eespecial organs for gaseous vary. Comparing their circulatory orders, the annelids own a closed circulatory order which comprehends class vessels neighboring their bark surfaces. These class vessels comprehend

class which carries nutrient and oxygen throughout the substantiality. Class is interrogate by the contractile parallel vessel which acts approve a kernel delayin the gut. The flatworms, in opposition, do not own any class vessels in their substantiality and there is no especialised circulatory order delayin the inlaterality substantiality.

Most of the flatworms entertain an inadequate digestive order which endures of the bung, pharynx and an domestic delay one fissure. Similarly, the annelids so entertain a bung and pharynx. However, it has a rather adequate digestive order in which their domestic has two fissures. The two fissures in the domestic admit for influence motion through the bung and admits for devastate perspiration through the anus. When comparing excretory order in flatworms delay that of annelids, diverse distinctions are discovered. The flatworms excrete their devastate into the gastrovascular conconsmoothness and enucleate their devastate through their bung. On the adverse, the annelids own a two of excretory glands disclosed as metanephridia in each member that excretes divisible devastates products. Add on to that, cubic devastate products can so be excreted through the introduce anus. (RussellHYPERLINK “#_ENREF_3” et al.HYPERLINK “#_ENREF_3”, 2011) Hence, twain these phyla own divergent ways of devastate perspiration.

The flatworms own a lowly laconic order which endures of two lowly agreement named ganglia. The ganglia are a package of resolutions which connects to the hankeritudinal resolution cords and run throughout on the either edge of the substantiality. In enumeration, they own eye spots which admit them to expose for sslight signatures. (Alters, 2000) On the other edge, the laconic order of annelids is rather involved in organization. The annelids endure of a dorsal brain delay a two of resolutions on either edge. They so endure of a two of ventral resolution cords conjoined to ganglia in each member. Furthermore, they so own rectangular resolutions attaching to the ganglia in each member giving the involvedity of the laconic order in annelids.

Both flatworms and annelids own so adopted low reproductive strategies to fix their continuance abutting opportunity. In their reproductive agencys, twain flatworms and annelids are talented to generate asexually or sexually. In asexual multitudinousness, twain of them are talented to generate through clonal fragmentation. When a flatintroduce or an annelid is divide into destroy-matter, each of these destroy-matter gain straightly restore and disclose into a new flatworm. In sexual multitudinousness, twain flatworms and annelids own hermaphroditic sexual organs which admit them to ill-conditioned fertilise via copulation. After ill-conditioned-fertilisation, the introduce secretes a cocoon where the fertilised eggs are deposited. Such sexual and asexual reproductive strategies admit these introduces to expand and obstruct them from obsolescence abutting the opportunity.

The eminent dissonance of organization is a end of a hanker narrative of extrication. Classification of voluptuouss according to their morphological idiosyncrasy yields a eminenter point of description to the voluptuous behaviour. The lowities in the morphological organization and multitudinousness orders betwixt the Platyhelminthes and Annelida allude-to their low house. However, judging barely from their morphology and reproductive order quaint is scant to dispose these voluptuouss. Hence, we want to appear into other key idiosyncrasys that admit us to divergentiate betwixt Platyhelminthes and Annelida. One of the most material key idiosyncrasys that admit us to dispose voluptuouss is genetics. Modern genetic techniques admit us to collate genetic sequences to show their low house. Therefore, molecular grounds obtained from DNA gain yield an complimentary and conducive machine for the identification of the voluptuous phyla.

Literature Cited

Alters, S., 2000. Biology: Understanding activity. Jones and Barlette Publishers.

Moore, J., 2006. An importation to the invertebrates. Cambridge University Press.

Russell, P.J., P.E. Hertz and B. McMillan, 2011. Biology: The dynamic investigation. Cengage Learning.

Ttalented 1: shows the lowities and differences betwixt Platyhelminthes and Annelida

Characteristics

Similarities

Differences

Platyhelminthes

Annelida

Platyhelminthes

Body symmetry

Biparallel symmetry

Body organization

Soft-bodied invertebrates, does not own limbs

Dorsoventrally flattened,

unsegmented

Cephalisation

Have a crown and a tail

Coelom

Triploblastic

Acoelomates(externally substantiality concavity)

Gas vary

System

Diffusion through bark

Absence of class vessels

Circulatory System

No especialised circulatory order

Digestive System

Inadequate (gut has one fissure)

Excretory order

Excrete devastate by bung

Nervous System

lowly resolution ganglion, own eye spots that expose slight

Reproduction

Both own asexual and sexual multitudinousness

Fig 1 shows the morphological organization of the annelids.

Fig 2 shows the morphological organization of the flatworm.

Ready to perfect your paper?

Order my Paper How it works
You place an order

To get started, you need to complete an order form on our website. Ask our Support managers for help if you got stuck on one of the steps.

We assign the best writer for you

Our manager will start searching for the writer once you've paid for the order. You will be able to communicate with the writer through our message system.

You review the finished work

When the paper is ready, you will receive notification and will be able to review it. You can ask for a free revision if you want to change anything in it.

You download your order

If you are satisfied with the paper, you can approve the order and download the final version in one of the available file formats.

Have a look at our samples

Expository essay
Paper title: Online Education
Academic level: Undergraduate (years 1-2)
Discipline: English 101
Paper Format: MLA format
Sources: 2
Analysis essay
Paper title: Advantages and Disadvantages of Lowering the Voting Age to Thirteen
Academic level: Undergraduate (years 1-2)
Discipline: Political sciences
Paper Format: APA
Sources: 1
Argumentative essay
Paper title: Keeping Animals in Zoos Is not Justifiable
Academic level: Undergraduate (years 1-2)
Discipline: Ethics
Paper Format: APA
Sources: 5
Cause & effect essay
Paper title: Placing Taxes on Junk Food and Fatty Snacks: Can we tax people healthy?
Academic level: High School
Discipline: Nutrition/Dietary
Paper Format: APA
Sources: 3
Compare & contract essay
Paper title: School Uniforms versus No School Uniforms
Academic level: Undergraduate (years 1-2)
Discipline: Education
Paper Format: Harvard
Sources: 3
Critical essay
Paper title: Having Cell Phones in Elementary School
Academic level: Undergraduate (years 1-2)
Discipline: Education
Paper Format: MLA
Sources: 3
Definition essay
Paper title: What is Fashion for Modern Teenagers?
Academic level: Undergraduate (years 1-2)
Discipline: Urban studies
Paper Format: MLA
Sources: 2
Descriptive essay
Paper title: Hollywood to Bollywood: What makes a movie good?
Academic level: Undergraduate (years 1-2)
Discipline: Film & theater studies
Paper Format: MLA
Sources: 2
Evaluation essay
Paper title: The Impact of Violent Games on Children
Academic level: Undergraduate (years 3-4)
Discipline: Psychology
Paper Format: Chicago
Sources: 2
Narrative essay
Paper title: Animals I Have Loved: What’s wrong with another shaggy dog story?
Academic level: High School
Discipline: Composition
Paper Format: Harvard
Sources: -

Used by over 20,000 students

We value our customers' feedback a great deal, and use it to constantly improve and enhance our services. Read on to discover some thoughts from students just like you!

Trustpilot logo 9.8
5/ 5

Good work!

Quick turnaround of a high quality piece of work. Expensive but in specific situations very valuable.

5/ 5

Bravo!

I was really stuck and this gave me the kick start I needed. Used it as they explained and found it so helpful.

5/ 5

Perfect!

I would definitely recommend Writemyessay.college any student who is finding it diff to write assignment. I am very pleased with the piece of work

5/ 5

Job Well Done!

Perhaps too good. Certainly gave me a huge learning curve at a shorter space of time. Great for a backbone to work on, then make it your own using your own efforts.

5/ 5

Perfect!

I am always satisfied with the services provided, and what I like the most is the understanding, which had helped a lot.

5/ 5

Brilliant!

I am never disappointed with this service and have tried many. I now trust that I will receive a good writer as the service ensures they understand your requirements prior to delivery.

5/ 5

Satisfied!

I'm very happy to cooperate with Writemyessay.college from the beginning of my studying, without their help I wouldn't be here. Thank you Writemyessay.college!

5/ 5

Thank You!

Excellent and professional service from all involved with Writemyessay.college all of the time.

Recently written papers

ID Topic / type Discipline / level Pages Delivered
1 2 3

Our core values

Confidentiality

We value confidentiality, are you worried that your professor will discover you used buy an essay service? Do not worry, that will never happen. You are anonymous in our services.

Plagiarism Free Paper

We provide only plagiarism free papers. Our writers use similarity index software to ensure that your paper meet academic requirements. All papers delivered are unique.

Strict Deadline

When you give us a deadline to deliver your paper, we deliver on time. We will update you in every stem of the way until the paper is delivered.

Professionalism

Our staffs and writers uphold the highest level of professionalism. We do not request unnecessary information and only communicate when neccesary.

Value for Money

We are committed to providing value for every dollar paid. Our refund policy is clear on ground for which we do a partial or full refund.

24/7 Support

We literally don’t sleep in order to serve you. We have a 24/7 customer support system where you can follow up on your orders.

Questions?

Ask our team

Want to contact us directly? No problem. We are always here for you.

Frequently Asked Buy an Essay Questions

See all
Is your service confidential?

When you place an order with our company, we ask you to provide us with such personal information as your name, phone number, and email address. We need this data to keep you updated on the important things related to your order or account, and never share it with any third parties. We also don’t use your contact details for spamming you.

Please note that our support team may contact you using only the phone number(s) stated on our website, such +1 (248) 599-2414 and/+44 (151) 528-2636. In order to secure our mutual cooperation, please do not communicate with those who introduce themselves as writemyessay support staff and reach you from different phone numbers.

Also, remember that we never ask you to provide your credit card information via phone conversations. You should enter this information only on PayPal or Gate2Shop billing forms when making an online payment on our website. The writemyessay support administrator will send a confirmation letter to your personal order page when your payment is received.

We also use a secure encrypted connection and do not store your private data if we do not need it anymore. For more details about how we ensure your confidentiality, check our Privacy Policy, which completely complies with the GDPR.

We offer original model papers that can be used legally in a number of ways if properly referenced:

  • As a source of arguments or ideas for your own research
  • As a source of additional understanding of the subject
  • Direct citing

Nonetheless, check your college’s/university’s policies, including their definition of plagiarism and paraphrasing before using our services. Make conscious decisions in regards to your education.

How do I order a paper from writemyessay?

We take care not only of your academic success, but also of your experience with us. That’s why we have made the process of placing your order as easy and fast as possible—usually, it takes no more than 2-3 minutes.

Let’s have a closer look at the simple steps you need to go through for submitting your order:

Fill in the order form.

Be sure to include specific instructions regarding your paper and to upload any of the required materials. If you have any questions while specifying your paper’s information, just click on the info sign at the end of every field name and you will see a detailed tip on what exact information is required.

Proceed with the payment.

After you are through with the order form, you will need to make a payment via a preferable system. Right after that, you will be automatically provided with your personal order page where you can track your order’s progress, provide additional requirements, and send messages to your writer or support manager.

A personal writer is assigned to your order.

Our qualified staff will choose the most suitable writer whose skills and experience match your field of study and paper’s details. In case the writer must have any particular software or literature in order to get the assignment done, please do not forget to mention this in your initial instructions.

Your paper is completed and delivered to your personal order page.

When the writer finishes your paper, it is delivered to your personal order page as a PDF document, available for preview only. You will be able to download an editable MS Word version of the order right after you click the “Approve” button in the “Files” tab of your personal order page. If any changes are to be applied to the paper, you are always welcome to request a free revision with a new deadline for the writer (be sure to check more information about this in our revision policy).

You can check how easy the process is by going to the order page and submitting your paper details right now.

Is there a money-back guarantee? If yes, how can I receive a refund?

You can get more details about possible types and terms of refunds on our official money-back guarantee page.

How will I receive a completed paper?

You will get the first version of your paper in a non-editable PDF format within the deadline. You are welcome to check it and inform us if any changes are needed. If everything is okay, and no amendments are necessary, you can approve the order and download the .doc file. If there are any issues you want to change, you can apply for a free revision and the writer will amend the paper according to your instructions.

If there happen to be any problems with downloading your paper, please contact our support team.

What if I’m not satisfied with my order?

If your paper needs some changes, you can apply for a free revision that is available for 7 days after your paper is approved. To use this option, you have a “Revision” button on your personal page.

After the 7-day period, you cannot apply for a free revision, though you still can use a paid revision option. The price of such a revision will differ depending on the number of amendments needed to be done. Please contact our support team to find out how we can help you with the amendments to your paper.

If you think our writer didn’t manage to follow your instructions, and as a result, your paper is of poor quality, please contact us and we will do our best to solve the problem.

If the revisions didn’t give the desired result, you can apply for a refund. Our dispute department will process your inquiry to find out what kind of refund we can give you. To find out more, please visit our money-back guarantee page.

How do I request a refund?

You can’t apply for a refund on certain stages of your order, like when the order is not finished by the writer yet.

When the paper is delivered, the “Refund” button on your personal order page becomes clickable.

On the relevant tab of your personal order page, you will also be able to choose the type of refund you’re demanding and the reason why you applying for it. As soon as you do that, our dispute department will start working on your inquiry. All kinds of refunds concerning the quality or the lateness of your paper should be requested within 14 days from the time the paper was delivered, as in 14 days your paper, will be automatically approved.

Your inquiry should be submitted by clicking the “Refund” button on your personal order page only.