PHYLUM ECHINODERMATA Flashcards
are deuterostome since the embryonic blastophore become the anu and the moith is formed second
echinoderms and chordates
zoologist believe that —– share common ancestor with the chordate for this reason
echinoderms
several of their species are widely used for developmental studies as their embryogenesis can illuminate features of the developmental program of deuterostomes
echinoderms
they embryos have simple structure and are highly transparent
echinoderms
means “hedgehog skin”
echinoderm
they have a spiny skin with defensive and interlocking spines arising from their endoskeleton composed of calcium carbonate
echinoderm
the endoskeleton of echinoderm is made of
calcium carbonate
adult echinoderm show what symmetry
radial symmetry
what is the symmetry of echinoderms in larvae stage
bilateral symmetry
echinoderm means
hedgehog skin
the echinoderms are all marine animals and includes ——– , ——-, ——, and ——
sea stars
sea urchins
sea lillies
sea cucumbers
a unique feature of this phylum is a water vascular system
echinoderm
a system of fluid filled tubes whihc functions in locomotion, respiration ad obtaining food
water vascular system
they move on numerous tiny tube feet inflated by coelomic fluid pushed in by muscular ampullae
echinoderms
echioderms move on numerous tiny tube feet inflated by coelomic fluid pushed in by muscular ——-
ampullae
they lack a circulatory system as fluid in ther coelom fulfills this function and gas exchange occurs through the tube feet
echinoderm
they display a relatively simple nervous system
echinoderm
it means separate male and female individuals
dioecious
where do echinoderms release their sperm and egg cells and fertilization occur
in the water
what stage do echinoderms metamorphosise
adult form
these are used in some sushi or uni sushi
sea urchin eggs or roe
have good regeneration capabilities of their lost body parts
echinoderms
they can have their cut arms capable of developing into a whole animal if part of the body is still attached to it
sea stars
echinoderms’ embryos rapidly develop and have a simple —— and are highly ——
simple structure and highly transparent
