4 Written Questions
3 Multiple Choice Questions
- Gas exchange and excretion occur via diffusion across individual cell membranes.
- no body cavity
- no true tissue
3 True/False Questions
what do they lack? → They lack tissues, organs, and organ system.
What kind of feeding? → intracellular
How do the sponges have structure and strength? → The sponge body is comprised of a couple different cell types that form the outside and inside layers of the body wall.