Exam 23: Vessels and Circulation

The reason much of the blood in the fetal right atrium is shunted to the left atrium through the foramen ovale is

In general,arterioles have _______ layers of smooth muscle.

The _________ run(s)adjacent to the medial surface of the upper limb and eventually helps form the axillary vein.

Formed primarily of tunica intima and strengthened by elastic and collagen fibers,the _________________ in veins prevent blood from pooling.

The superior vena cava is formed by the merging of the _______ veins.

The umbilical arteries carry _______ blood.

The left renal vein,right renal vein,right suprarenal vein,and right gonadal vein merge directly into the

The artery pair that supplies the lower limbs are the

The process of forming blood vessels is called ________.

During development,the left dorsal aorta and the common dorsal aorta form the descending aorta.