The outer layer of cells, the ectoderm, in a developing embryo gives rise to the muscle system.
A. Reproductive system
B. Circulatory system.
C. Skeletal system.
D. Nervous system.
Answer:D
The outer layer of cells, the ectoderm, in a developing embryo gives rise to the muscle system.
A. Reproductive system B. Circulatory system. C. Skeletal system. D. Nervous system.