The only organ system formed from all three germ layers (ectoderm, mesoderm, and endoderm) is the
a. cardiovascular system.
b. digestive system.
c. endocrine system.
d. muscular system.
e. nervous system.
Answer: c
The only organ system formed from all three germ layers (ectoderm, mesoderm, and endoderm) is the
a. cardiovascular system.
b. digestive system.
c. endocrine system.
d. muscular system.
e. nervous system.
Answer: c