18.1 Overview of Arteries and Veins

Question 1

Blood vessels are organs with three tissue layers that surround a hollow ________: the innermost _______, the middle ___________, and the outermost_______.

Answer 1

Blood vessels are organs with three tissue layers that surround a hollow lumen: the innermost tunica intima, the middle tunica media, and the outermost tunica externa.

Question 2

Arteries typically have a thicker _______, a thicker_______, and more extensive _______than do veins.

Answer 2

Arteries typically have a thicker wall, a thicker tunica media, and more extensive elastic laminae than do veins.

Question 3

What are te three types of arteries?

Answer 3

There are three types of arteries:

1. elastic arteries, the largest arteries;
2. muscular arteries, which deliver blood to organs;
3. and arterioles, which control blood flow to tissues.

Question 4

Certain arteries contain baroreceptors that monitor blood pressure and chemoreceptors that detect the oxygen, carbon dioxide, and hydrogen ion concentrations of the blood.

Question 5

The pulmonary and systemic circuits consist of three types of vessels:

*

Answer 5

The pulmonary and systemic circuits consist of three types of vessels:

arteries, the vasculature’s distribution system;

capillaries, the vasculature’s exchange system;

and veins, the vasculature’s collection system.

Question 6

_________are the smallest veins that drain capillary beds.

Veins function as blood reservoirs and many contain venous valves that prevent blood from flowing backward.

Answer 6

Venules are the smallest veins that drain capillary beds. Veins function as blood reservoirs and many contain venous valves that prevent blood from flowing backward.

Question 7

True or False: Many vessels in the body are connected by anastomoses.

Answer 7

true

Question 8

Which vessels serve as the blood reservoirs of the body?

metarterioles

muscular arteries

arterioles

veins

Answer 8

Which vessels serve as the blood reservoirs of the body?

metarterioles

muscular arteries

arterioles

veins