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

Explain objective anti-arrhythmic pacemaker defibrillators, Explain Objecti...

Explain Objective Anti-arrhythmic pacemaker defibrillators? After reading this unit, you should be able to: 1 describes the classification of ant arrhythmic drugs; 2 understand

Legal rights of psychiatric patients, LEGAL RIGHTS OF PSYCHIATRIC PATIENTS:...

LEGAL RIGHTS OF PSYCHIATRIC PATIENTS: When a patient is admitted in psychiatric hospital he may be deprived of  the freedom  to leave the hospital, and also to maintain certai

Importance of the glucose blood level for human health, Q. What is the impo...

Q. What is the importance of the glucose blood level for human health? The glucose blood level (glycemia) must be kept normal if it is abnormally low there is not sufficient gl

Briefly describe about caramelization, Briefly describe about Caramelizatio...

Briefly describe about Caramelization? Caramelization results from the action of heat on sugars at about 175º C. At high temperatures, sugars dehydrate, break down and polymeri

Homework, How do adhesion and cohesion help plants move materials?

How do adhesion and cohesion help plants move materials?

Zoology of Protozoa, How does the metachronal waves form in the ciliary row...

How does the metachronal waves form in the ciliary row of protozoa ? Explain the cilia beating mechanism associates with it.

Determine factors affecting zn absorption - micro minerals, Determine Facto...

Determine Factors affecting Zn Absorption - Micro Minerals? In the last unit you have studied that absorption of various minerals (bioavailability) is influenced by number of f

Removal of a patient''s peripheral intravenous catheter, Removal of a patie...

Removal of a patient's peripheral intravenous catheter resulted in brief bleeding and the loss of a small amount of blood. Which of the following processes occurred during the form

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