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

Show takhtajans system of classification, Q. Show Takhtajans System of Clas...

Q. Show Takhtajans System of Classification? Another important phytogenetic system was proposed by Takhtajan, the famous Russian Palaeobotanist working at Komarov Botanical Ins

Filaments of a sarcomere in a skeletal muscle is decreasing, When the overl...

When the overlap between the thin and thick filaments of a sarcomere in a skeletal muscle is decreasing, the A. total length of the I band minus the length of the H zone is dec

.excretion, name the blood vessel which bring waste product to kidney

name the blood vessel which bring waste product to kidney

Explain enteral nutrition, Enteral Nutrition  (EN) By definition, the t...

Enteral Nutrition  (EN) By definition, the term  enteral  means  "within or by the way of  the gastrointestinal (GI) tract." As described above, enteral is defined as provision

Importance of intestinal bacterial synthesis - vitamin k, Define Importance...

Define Importance of Intestinal Bacterial Synthesis as a Source of Vitamin K? Intestinal microflora synthesizes large amounts of menaquinones, which are potentially available a

Post removal -endodontics principles, Post removal Types of post : ...

Post removal Types of post : -Active threaded -Passive -Custom casted Cement used : -Traditional cement -bonded with a composite resin -Dentin-bonding agent -Pro

Explain the soft tissue management, Soft tissue Management The periimpl...

Soft tissue Management The periimplant soft tissue is very critical in the aesthetic zone. The handling of the tissue during surgery to minimize trauma, the preservation of ker

What are the major cells of the connective tissue proper, Q. What are the m...

Q. What are the major cells of the connective tissue proper? What is the name given to the intercellular material that surrounds these cells? The major cells of the connective

Is the epithelium vascularized, Q. Is the epithelium vascularized? How do o...

Q. Is the epithelium vascularized? How do oxygen and nutrients reach the epithelium? Why is this feature an important evolutionary acquisition? Epithelia are not vascularized c

Epidemiology, Epidemiology:   The study of disease in populations.  In...

Epidemiology:   The study of disease in populations.  Includes: The Aetiology of the disease Patterns of distribution of the disease How the disease spread

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