Mesoderm, one of the germ layers, gives rise to a group of structures In animals. Which group Includes structures of exclusively mesodermal origin ?

Options

A. skin, brain. bladder, vagina
B. muscle, outer layer of digestive tract, cartilage, bone
C. bone, lens of the eye, pars distalis, gall bladder
D. trachea, lungs, stomach, skin.

Answer

B

Explanation

Mesoderm is the middle layer of the three primary germ layers. The following are considered to be of mesodermal origin :
1.connective tissue, cartilage , and bone
2.striated and smooth muscle
3.blood and lymph cells
4.walls of the circulatory system
5.genito-urinary system
6.Spleen