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;
14 Cards in this Set
- Front
- Back
|
grade of construction |
complexity and type of construction |
|
|
asconoid |
body wall not folded, choanocytes only present in central spongocoel, only one osculum |
|
|
synconoid |
body wall folds to create channels lined with choanocytes, spongocoel lined by pinacocytes |
|
|
leuconoid |
thick body, many tiny chambers lined with choanocytes, complex series of channels |
|
|
Calcarea |
class containing all 3 grades of construction, spicules made of CaCO3, 2, 3, or 4-pointed |
|
|
Hexactinellida |
class containing syconoid construction, spicules 6-pointed and made of SiO2 |
|
|
Demospongiae |
class containing leuconoid construction, support is spongin fibers or SiO2 spicules with 2, 3, or 4 points |
|
|
osculum |
opening that filtered water flows out through |
|
|
choanocyte |
flagellated cell that generates current and filters seawater through collar |
|
|
pinacocyte |
flat cells on outside of sponge that contract and can generate collagen |
|
|
ostia |
tiny openings into choanocyte-lined channels |
|
|
spongocoel |
opening in center of sponge |
|
|
pores |
openings water flows through before entering ostia (S and L grade sponges only) |
|
|
spongin |
protein that is responsible for support structures in some Demospongiae |
