Question

which structure? using the vocabulary discussed in this resource, write the cell or structure that each description statement is summarizing. structures may be used more than once.
description statement\tsponge structure
glass - like, sharp - pointed structures that make up the frame of some sponges
the large opening in the top of a sponge
the pores of a sponge
a jelly - like substance between the outer and inner cell layers of a sponge
also known as collar cells
a soft and flexible protein that makes up the frame of some sponges
carry nutrients from the choanocytes to other body cells
egg cells
the base that anchors a sponge down
create spicules
have a flagellum that whips back and forth to create a water current through the sponge
where wastewater exits a sponge
filled with spicules, sclerocytes, amoebocytes, and oocytes
can transform into oocytes
can move through the mesohyl
made of calcium carbonate or silica
large central cavity in a sponge
contract and relax to control how much water enters pore cells
the substance that makes natural bath sponges soft and squishy
have microvilli that trap food particles
where water containing nutrients and oxygen enters a sponge
the “skin” cells of a sponge

Explanation:

Sponges are simple multicellular organisms. Spicules are the glass - like, sharp - pointed structures. The osculum is the large opening at the top. Ostia are the pores. Mesohyl is the jelly - like substance. Choanocytes are collar cells. Collagen makes up the frame in some. Amoebocytes carry nutrients. Egg cells are reproductive cells. The holdfast anchors the sponge. Sclerocytes create spicules. Choanocytes have flagella for water current. The osculum is also where wastewater exits. The mesohyl contains various cells. Archaeocytes can transform into oocytes. Amoebocytes can move through mesohyl. Spicules are made of calcium carbonate or silica. The spongocoel is the large central cavity. Porocytes control water entry. Collagen makes natural bath sponges soft. Choanocytes have microvilli for trapping food. Ostia are where nutrient - rich water enters. Pinacocytes are the "skin" cells.

Answer:

1. Spicules
2. Osculum
3. Ostia
4. Mesohyl
5. Choanocytes
6. Collagen
7. Amoebocytes
8. Egg cells
9. Holdfast
10. Sclerocytes
11. Choanocytes
12. Osculum
13. Mesohyl
14. Archaeocytes
15. Amoebocytes
16. Spicules
17. Spongocoel
18. Porocytes
19. Collagen
20. Choanocytes
21. Ostia
22. Pinacocytes