During the embryonic stage, the primary germ layers develop from the

A. morula.
B. embryonic disc.
C. blastocyst.
D. placenta.


Answer: B

Anatomy & Physiology

You might also like to view...

Some integral proteins form ________ that let water molecules, ions, and small water-soluble compounds cross the membrane.

Fill in the blank(s) with the appropriate word(s).

Anatomy & Physiology

The outermost meninx, the ________, envelops the brain and attaches anteriorly to the crista galli and inferiorly around the foramen magnum.

Fill in the blank(s) with the appropriate word(s).

Anatomy & Physiology

Changes in the rate and depth of breathing are regulated primarily by the:

A) pH of venous blood. B) pH of the CSF. C) saturation of oxygen and hemoglobin. D) amount of oxygen in the blood plasma.

Anatomy & Physiology

Identify the sesamoid bone of the lower limb

A) femur B) patella C) calcaneus D) fibula E) tibia

Anatomy & Physiology