Porifera Lab Questions

Question 1

Canal System

Answer 1

Having a constant water current through the organism for food and oxygen

Question 2

Pores

Answer 2

Create opening in side of sponge to allow water to come inside for current.

Question 3

Choanocytes

Answer 3

A collar cell that creates its own current to pull in particles in water to catch on their mucus covered collars of microvillu (intracellular digestion)

Question 4

Pinacocytes

Answer 4

Like an epithelium, but not bc there is no basement membrane.

Can contract and relax to regulate water flow

Question 5

Amebocytes

Answer 5

Also called archaeocytes. Transport food in organism for intracellular digestion, also used for reproduction

Question 6

Mesenchyme

Answer 6

gelatinous matrix within a sponge

Question 7

Spicules

Answer 7

Structural calcium carbonate or silica cell (abrasive)

Question 8

Spongin

Answer 8

A structural collagen protein fibril

Question 9

Respire

Answer 9

diffusion

Question 10

Excrete

Answer 10

water flow (no system)

Question 11

Reproduce

Answer 11

Sexual or asexual

Question 12

Move

Answer 12

Adults are sessile, immature can swim or float

Question 13

Feed

Answer 13

Coanocyte pulls in food particles

Question 14

Tissues?

Answer 14

No true tissues

Question 15

Organs?

Answer 15

None

Question 16

Organ systems?

Answer 16

None

Question 17

Germ layers?

Answer 17

No true germ layers

Question 18

Symmetry?

Answer 18

Asymetrical

Question 19

Cephalization?

Answer 19

None

Question 20

Body cavity?

Answer 20

Aceloemate