2
They have one opening opening according to Biology flatworm notes I found. By Khoa
No, a flatworm does not have a body coelom.
Reptiles have 2 body openings. Mouth and an anus.
7
4
1
2
12
Ostium.
12 i think
Defenite head and tail regions
The famous animal the "Porifera", has 6 body openings.