Animal Kingdom Part 8 || Ctenophora || Platyhelminthes || Class 11 NEET Biology || Pnkj Verma Sir

Ctenophores, commonly known as sea walnuts or comb jellies
are exclusively marine, radially symmetrical, diploblastic
organisms with tissue level of organisation. The body bears
eight external rows of ciliated comb plates, which help in
locomotion. Digestion is both extracellular and
intracellular. Bioluminescence (the property of a living
organism to emit light) is well-marked in ctenophores. Sexes
are not separate. Reproduction takes place only by sexual
means. Fertilisation is external with indirect development.
Examples: Pleurobrachia and Ctenoplana.

Phylum – Platyhelminthes
They have dorso-ventrally flattened body, hence are called
flatworms. These are mostly endoparasites found
in animals including human beings. Flatworms are bilaterally
symmetrical, triploblastic and acoelomate animals with organ
level of organisation. Hooks and suckers are present in the
parasitic forms. Some of them absorb nutrients from the host
directly through their body surface. Specialised cells called
flame cells help in osmoregulation and excretion. Sexes are not
separate. Fertilisation is internal and development is through
many larval stages. Some members like Planaria possess high
regeneration capacity.
Examples: Taenia (Tapeworm), Fasciola (Liver fluke).

Watch my other videos for neet free of cost👇👇👇👇👇

Chemical Coordination and Integration👇
https://www.youtube.com/playlist?list=PLcZuqXgSt6iE33RtqAxKjFgBkKWlgldo

Strategies for Enhancement in food production-
All videos-👇👇👇
https://www.youtube.com/playlist?list=PLcZuqXgSt6iEIvGSW5VQZAkk6hewgO76z

Microbes in Human welfare-
All videos--👇👇
https://www.youtube.com/playlist?list=PLcZuqXgSt6iHNPCjeHlilMIaML7x1zZuT

Biotechnology (complete unit)-👇
https://www.youtube.com/playlist?list=PLcZuqXgSt6iELS8Lo-04G72gLXe1RNJtI

Animal tissues- (All lectures)--👇👇
https://www.youtube.com/playlist?list=PLcZuqXgSt6iFNiCRAsx5gwgJUd72VimN-

Human Health and Disease (All lectures)--👇
https://www.youtube.com/playlist?list=PLcZuqXgSt6iEhe3nBjvA38xfht7PkEZiN

Body Fluids and Circulation--👇👇
https://www.youtube.com/playlist?list=PLcZuqXgSt6iFpgPGA50tzwN8QFp2xeMUv

For any other information or queries, you can use comment box or you can mail me at-
biomania71@gmail.com

Видео Animal Kingdom Part 8 || Ctenophora || Platyhelminthes || Class 11 NEET Biology || Pnkj Verma Sir канала Biomania- Biology Classes