Lab 1

Question 1

choanocytes

Answer 1

Specialized cells that produce what flow and capture food

Question 2

pinacoderm

Answer 2

One of the two types of proto-epithelial layers in sponges

consist of pinacocytes which cover outside of sponge

Question 3

choanoderm

Answer 3

One of two types of proto-epithelial layers in sponges

consist of choanocytes which line the internal water chambers

Question 4

mesophyll

Answer 4

connective tissue layer between pinacoderm and choanoderm

lots of collagen, spicules, and spongin

Question 5

spicules

Question 6

spongin

Question 7

asconoid

Answer 7

simplest body structure, vase shaped, choanocytes-lined central spongocoel

Question 8

syconoid

Answer 8

vase-shaped, multiple choanocyte-lined chambers that each open directly into central spongocoel

Question 9

leuconoid

Answer 9

no spongocoel, replaced by many choanocyte-lined chambers that are interconnected by channels

Question 10

spongocoel

Question 11

atrium

Question 12

What is advantage of increasing SA of choanoderm relative to volume of sponge

Answer 12

This allows the sponge to absorb more nutrients from the water

Question 13

Calcarea

Answer 13

Class of Porifera
-Marine Sponges
-all have spicules composed from calcium carbonate
- have all structural types within class (asconoid, syconoid, leuconoid, )