Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
33 Cards in this Set
- Front
- Back
|
[Phylum Echinodermata] list the class:
|
**Asteroidea (starfish)
**Echinoidea (sea urchins and sand dollars) **Holothuroidea (sea cucumbers) **Ophiuroidea (brittle stars) **Crinoidea (sea lily, feathers stars) |
|
|
All echinoderms are exclusively
a. marine b. fresh water c. terresterial |
marine
|
|
|
Echinodermata are the only _____ invertebrates to display ____ as adults
|
**coelomic
**radial symmetry side note: larvae of starfish and other echinoderms are bilateral |
|
|
Most echinoderms have a conspicous ________, and is cover with a layer of ______.
|
**calcareous endoskeleton
**epithelium |
|
|
the endoskelton consists of small calcareous plates joined together by tough _______.
|
connective tissue
|
|
|
Echinoderms possess a:
a. well-develop coelom b. acoelomate |
a. well-develop coelom
|
|
|
The water-vascular system is a ...
|
hydraulic system for locomotion and some circulation
|
|
|
Is excretory organs absent or present?
|
absent
|
|
|
is respiratory organs absent or present
|
absent
|
|
|
Is circulatory sturctures absent or present?
|
present, but are vestigial (structures that has lost is function)
|
|
|
Sp =
sp = ip = |
Sp= supraphylum
sp= subphylum ip= infraphylum |
|
|
what are the taxonomic level:
|
phylum, class, family, genus, species
|
|
|
adult have _____ symmetry and juveniles have _____ symmetry.
|
*radial symmetry
*bilateral symmetry |
|
|
the adult body is composed of a ______, and five ________
|
central disk
five rays or arms |
|
|
Pedicellarie are small outgrowths that terminate in calcareous pincers (mircoscopic pinches) that ____
|
remove debris and parasites from the surface.
|
|
|
[Digestive system] the stomach is divided into a
|
globular portion, the cardiac stomach and an aboral pentagonal shaped pyloric stomach
|
|
|
extending from the pyloric stomach into each arm is a pair of ____
|
digestive caeca (also know as hepatic caeca, pyloric caeca)
|
|
|
the short intestine extends from the ______ of the pyloric stomach and terminates in the _____
|
aboral surface
anus |
|
|
Are starfish carnivourous or herbivorous?
|
canivourous
|
|
|
[process of eating and digesting] when feeding a starfish will evert (turn inside out) its _____
|
cardiac stomach
**which secrete enzymes that helps aid in digestion of its prey |
|
|
[digestive system]
strand-like muscles running to the various arms attach the bulbous cardiac stomach and allow it to |
be everted and retracted
|
|
|
the partly digested food is carried into the ______ and then into the ________ where he majority of breakdown and absorption occurs
|
pyloric stomach
digestive caeca |
|
|
Nutrients diffuse from the caeca into the coelomic fluid are distributed throughout the body by the
|
water-vascular system
|
|
|
[Circulatory/Respiratory System]
Starfish have an open or close circulatory system |
open
|
|
|
the open circulatory system consist of ____, which are associated with the coelomic cavities.
|
ill-defined channels
|
|
|
____ also help circulate coelomic fluid to some extent
|
cilia (associated w/ the water vascular system)
|
|
|
does starfish have a heart
|
no
|
|
|
Gases diffuse via the ____
|
dermal branchiae
|
|
|
and soluble wastes are released by simple diffusion across
|
surface epithelium
|
|
|
[Nervous system] name them
|
**starfish have few special sense organs
**no cehphalization **possess nerves that are distributed throughout the arms and central disk |
|
|
[Echinodermata Reproductive system]
Most starfish are dioecious or monocious |
dioecious
|
|
|
The gonads may be seen
|
underneath the digestive caeca
|
|
|
Some species of starfish can reproduce _____.
|
asexually
*a single arm with part of the central disk may regenerate an entire body. |
