The circulatory system develops from the
A)ectoderm.
B)mesoderm.
C)endoderm.
D)trophoderm.

Question

Quizplus · Accepted Answer

The circulatory system, which includes the heart, blood vessels, and blood, develops from the mesoderm during embryonic development. The mesoderm is one of the three primary germ layers that form during gastrulation and gives rise to many different tissues and organs, including muscle, bone, and connective tissues. The ectoderm forms the skin and nervous system, while the endoderm gives rise to the gut, liver, and other internal organs. The trophoderm is a layer of placental cells that forms from the outer layer of the blastocyst during embryonic development in mammals.

The Circulatory System Develops from the