p-h-ylum pori-f-era

Question 1

what are porifera called and why?

Answer 1

• sponges or sponge bearers
• 0since body has numerous tiny pores calles ostia
• they are ceolomates

Question 2

what is their habit?

Answer 2

-all sponges are aquatic and sessile

Question 3

what is their habitat?

Answer 3

mostl;y amrine

except spongila whcih is fresh water

Question 4

explain symmentary in porifera?

Answer 4

• asymmertrical

- some are radial

Question 5

what are some general charectristics of porifera?

Answer 5

• cellular level of organization
• segmentation absent
• body plane is cell aggergate
• -intracellular digestion(done by choanocytes)
• lack respiratory system
• lack circulatory system
• lack nervous system
• lack district nerve cells
• division of labour

Question 6

body wall

Answer 6

screenshot

Question 7

what choanocyte

Answer 7

• made up of cellular parts associated with flagella.

- aka collar cells

Question 8

what are flagella?

Answer 8

collects food from the water current running within the para gas6tric cavity and feeds it into the cellar part within which digestion takes place