Cnidaria and platyhelminthes - larval forms, Biology

Assignment Help:

Cnidaria and Platyhelminthes - Larval forms

Cnidaria

The common larval stage that is found in cnidarians is the planula which forms following gastrulation. The planula is elongated and radially symmetrical along with anterior and posterior ends. The surface is covered by ciliated cells. A mouth may be present, sometimes at the posterior end of the larva and the larva attaches by its anterior end. The planula might settle down to form a polyploids scyphistoma that ultimately farms the medusa. In several hydrozoans the planula forms the actinula larva that transforms into the medusa.

Platyhelminthes

Development in parasitic platyhelminths is usually complicated with several free swimming to parasitic larval forms. The progression is from miracidium to sporocyst to redia and cercaria.


Related Discussions:- Cnidaria and platyhelminthes - larval forms

Define types of dryers, Define types of Dryers? There are many other dr...

Define types of Dryers? There are many other dryer types available, such as; Osmotic Drying Impingement Drying Microwave and Dielectric Drying Superheated

Lab safety, Why should you not apply cosmetics while doing a lab experiment...

Why should you not apply cosmetics while doing a lab experiment in class?

What is class chondrichthyes, What is Class Chondrichthyes? Class Chond...

What is Class Chondrichthyes? Class Chondrichthyes takes its name from two Greek words. "Chondros"; means cartilage, and "ichthys"; refers to fish, therefore the name "cartilag

Mechanical valves, Mechanical Valves They are made of a combination o...

Mechanical Valves They are made of a combination of metal alloys, pyrolite carbon and dacron. Types of Mechanical Valves Caged-ball Valve (Star-Edwards) A me

Explain the burden of hypertension in heart diseases, Explain the Burden of...

Explain the Burden of Hypertension in heart diseases ? Since 1942, there have been several small and large population-based studies on Hypertension. A ineta-analysis showed an

Explain adverse effects, Explain Adverse Effects Fluconazole is genera...

Explain Adverse Effects Fluconazole is generally well tolerated. Gastrointestinal distress and rash can happen. Stevens-Johnson syndrome, anaphylaxis and hepatic necrosis have

Procedures for diagnosis - epidemiological data , Procedures for diagnosis ...

Procedures for diagnosis Epidemiological data:   The epidemiological information with regard to the history, symptoms, morbidity, mortality, seasonality, age, sex, breed and spe

Determine what is the Cell Cycle, The cell cycle undergoes a sequence of ch...

The cell cycle undergoes a sequence of changes which involve a period of growth replication of DNA, Followed by cell division. This sequence of changes is called cell cycle.

What are the ploidies of the generated cells, In which meiotic division doe...

In which meiotic division does the separation of the homologous occur? What are the ploidies of the generated cells after the end of that process? The separation of the homolog

What is interdental threaded cleaners, What is Interdental Threaded Cleaner...

What is Interdental Threaded Cleaners The use of floss is recommended around any implant-supported bridge, crown, or bar. Instruct the patient to wrap the floss around the impl

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd