Exam 23: Vessels and Circulation

The force per unit area that blood places on the inside wall of a blood vessel

Which situations are shared by both the blood supply of the lower extremity and the upper extremity? A: Supplied by a main arterial vessel B: Have arterial arches C: Have venous arches D: Have superficial network of veins E: Have deep network of veins

Among the advantages of the cerebral arterial circle is the presence of collateral channels of blood flow to the brain should a supply artery become blocked.

Very large blood vessels require their own blood supply,and this is provided by a network of small arteries called the vasa vasorum.

As a venous pathway moves closer to the heart,the veins

The artery that divides and forms the anterior and posterior tibial arteries is the _____ artery.

The azygos vein merges with the _____________ vena cava.

The branches that arise from the celiac trunk are the

As an arterial pathway moves farther from the heart,the arteries

Muscles,skin,the thymus,the lungs,and the CNS contain

The contraction of skeletal muscles plays an important role in the movement of blood in the veins.

The pulmonary arteries have _____ elastic tissue and ______ lumens than systemic arteries.

Of the three artery types,the elastic arteries have the better ability to vasoconstrict and vasodilate.

The elastic (or conducting arteries)conduct blood from the heart to the smaller muscular arteries.

_________________ capillaries have pores within each endothelial cell.

-In the figure showing an anterior view of the veins,which number indicates the cephalic vein?

Which send blood to either esophageal arteries or esophageal branches to supply the esophagus with blood?

Blood from the esophagus may return to the heart through both the superior and inferior vena cavae.

The cyclical process of contracting and relaxing of the precapillary sphincters is called _________________.

The artery that bifurcates into the right subclavian artery and the right common carotid artery is the