Term
EXTERNAL STRUCTURE/FUNCTION
Spines |
|
Definition
| Calcereous projections for protection and support |
|
|
Term
EXTERNAL STRUCTURE/FUNCTION
Pedicellariae
(2) |
|
Definition
Pincher-like structures
Keeps epidermis (aboral surface) free of parasites and algea |
|
|
Term
EXTERNAL STRUCTURE/FUNCTION
Dermal Branchiae
(2) |
|
Definition
Gas exchange
Excretion (simple diffusion) |
|
|
Term
EXTERNAL STRUCTURE/FUNCTION
Mouth |
|
Definition
| External opening from esophagus to cardiac stomach |
|
|
Term
EXTERNAL STRUCTURE/FUNCTION
Anus |
|
Definition
| Regulates egestion (feces) from body |
|
|
Term
EXTERNAL STRUCTURE/FUNCTION
Madreporite
(3) |
|
Definition
Porous opening to water vascular system
Pressure regulator
Simple filter |
|
|
Term
EXTERNAL STRUCTURE/FUNCTION
Ambulacral Grooves
(2) |
|
Definition
Radiate from mouth to tip of each arm
Houses tube feet |
|
|
Term
EXTERNAL STRUCTURE/FUNCTION
Tube Feet
(2) |
|
Definition
|
|
Term
|
Definition
|
|
Term
INTERNAL STRUCTURE/FUNCTION
Cardiac Stomach
(2) |
|
Definition
Everted through mouth to envelope prey
Site of initiation digestion |
|
|
Term
INTERNAL STRUCTURE/FUNCTION
Pyloric Stomach |
|
Definition
| Recieves digestive gland secretions for chemical digestion |
|
|
Term
INTERNAL STRUCTURE/FUNCTION
Digestive Glands
(3) |
|
Definition
Secretes digestive enzymes
Major role in absorption and storage of food materials
Connect to pyloric stomach through pyloric ducts |
|
|
Term
INTERNAL STRUCTURE/FUNCTION
Rectal Ceca
(2) |
|
Definition
Sm, branched trees
Increase surface area of intestine for more efficient nutrition absorption |
|
|
Term
INTERNAL STRUCTURE/FUNCTION
Gonads |
|
Definition
|
|
Term
INTERNAL STRUCTURE/FUNCTION
Ring Canal |
|
Definition
| Portion of water vascular system encircling mouth |
|
|
Term
INTERNAL STRUCTURE/FUNCTION
Radial Canals
(2) |
|
Definition
Portions of water vascular system emanating from ring canal
Leads into each arm |
|
|
Term
INTERNAL STRUCTURE/FUNCTION
Stone Canal |
|
Definition
| Portion of water vascular system leading from madreporite to ring canal |
|
|
Term
INTERNAL STRUCTURE/FUNCTION
Ampullae |
|
Definition
| Provides hydraulic pressure for movement of tube feet |
|
|
Term
INTERNAL STRUCTURE/FUNCTION
Ossicles of Endoskeleton |
|
Definition
|
|
Term
Class Asteroidea Characteristics
(3) |
|
Definition
Broad arms, indistinct from central disc
Tube feet w/ suckers in ambulacral grooves
Anus and madreporite present on aboral surface |
|
|
