The heart, muscles, bones, and blood develop primarily from ____.
A)ectoderm
B)mesoderm
C)endoderm
D)the placenta
E)the yolk sac

Question

Quizplus · Accepted Answer

The mesoderm is the embryonic germ layer that gives rise to the muscles, bones, heart, and blood. The ectoderm primarily forms the skin and nervous system, while the endoderm forms the digestive and respiratory systems. The placenta and yolk sac play supporting roles in embryonic development but do not give rise to the major organs and tissues.

The Heart, Muscles, Bones, and Blood Develop Primarily from ____