Poriferans are marine
Invertebrates are animals without 1.
animals full of 2.
Coelenterates are hollow-bodied or 3.
They have no space
bodies
inside so they have no 5.
worms.
Mollusks are soft-bodied or 8.
sca animals. Arthropods are 10.
system. Nematodes are 6.
long, thin, round, and pointed at one or both ends. Annelids are 7.
animals. Echinoderms are 9.
animals.
animals. Platyhelminthes have bodies that look like 4.​