Answer: B
A) mesoderm; nervous system, lungs, internal organs, and skin
B) chorion; endocrine system, muscles, placenta, and skeleton
C) ectoderm; circulatory system, skin, skeleton, and internal organs
D) endoderm; digestive system, lungs, urinary tract, and glands
Question 2
The ectoderm becomes the __________.
A) muscles and skeleton
B) nervous system and skin
C) circulatory system and other internal organs
D) digestive system, lungs, urinary tract, and glands
