Vessels and Circulation 1

Question 1

What is an anastomosis?

Answer 1

Site where two or more blood vessels merge to supply the same body region

Question 2

What are the vasa vasorum

Answer 2

Small blood vessels that supply the cells of the vessel wall

Question 3

Do ARTERIES become larger OR smaller as they progress from the heart?

Answer 3

Arteries become progressively smaller as they get further the heart.

Question 4

Which vessel type forms more anastomoses, veins or arteries?

Answer 4

Veins tend to form more anastomoses than arteries.

Question 5

Blood oxygen levels in veins of the systemic system are ______ in oxygen?

Answer 5

LOW

Question 6

Where are veins and arteries usually found in relation to the body?

Answer 6

Veins are usually more superficial than arteries. Arteries are usually more deep than the veins.

Question 7

Name the three kinds of capillaries.

Answer 7

• Continuous
• Fenestrated
• Discontinuous

Question 8

These blood vessels contain only the tunica intima.

Answer 8

Capillaries

Question 9

Arteries in the systemic circulation carry _______ blood to the body and tissues?

Answer 9

OXYGENATED

Question 10

Name the three types of arteries

Answer 10

• Elastic
• Muscular
• Arterioles

Question 11

Name the three layers or tunics of the blood vessels

Answer 11

• Tunica intima
• Tunica media
• Tunica externa

Question 12

This tunic is composed of an areolar connective tissue that contains elastic fibers, collagen fibers, and nerve fibers.

Answer 12

Tunica externa (tunica adventia)

Question 13

What is the inner most layer of a vessel wall

Answer 13

Tunica intima (tunica Interna)

Question 14

What is the middle layer of the vessel wall?

Answer 14

Tunica media

Question 15

What is an aneurysm?

Answer 15

Ballooning and/ or rupture of the vessel due to a weak vessel wall

Question 16

What is the outermost layer of the blood vessel wall?

Answer 16

Tunica externa (tunica adventia)

Question 17

Which blood vessel type contains a higher content of collagen and elastic fibers?

Answer 17

Arteries contain more elastic and collagen fiber types than veins.

Question 18

This tunic is composed of circularly arranged layers of smooth muscle cells under autonomic control.

Answer 18

Tunica media

NOTE: this tunic does contain elastic fibers as well

Question 19

Blood oxygen levels in arteries of the systemic system are ______ in oxygen?

Answer 19

HIGH

Question 20

The smallest blood vessels are?

Answer 20

Capillaries

Question 21

What are the functions of valves in veins?

Answer 21

To prevent pooling in the limbs and backflow in the veins

Question 22

Pulmonary circulation consists of the blood vessels that extend where?

Answer 22

To the lungs for gas exchange and then return oxygenated blood to the heart

Question 23

Do VEINS become larger OR smaller as they progress towards the heart?

Answer 23

Veins become progressively larger as they merge and get closer to the heart.

Question 24

Capillary type found in muscle, skin, lungs, and the CNS?

Answer 24

Continuous capillaries

Question 25

What is the function of anastomoses?

Answer 25

To provide alternate blood supply routes to tissues or organs. (aka collateral circulation)

Question 26

Blood oxygen levels in arteries of the pulmonary system are ______ in oxygen?

Answer 26

LOW

Question 27

This tunic is composed of simple squamous epithelium.

Answer 27

Tunica intima (tunica interna)

Question 28

Systemic circulation consists of the blood vessels that extend where?

Answer 28

To and from the body tissues

Question 29

Compare the general wall thickness of arteries and veins.

Answer 29

- Arteries are thicker than companion vein - Veins are thinner than companion artery

Question 30

In relation to the heart, blood flow in arteries takes blood where?

Answer 30

Arteries transport blood AWAY from the heart to the body.

Question 31

Blood pressure is lower In which vessel type?

Answer 31

Blood pressure is lower in veins than arteries.

Question 32

Vasodilation and vasoconstriction result as a change in the tunic?

Answer 32

Tunica media

Question 33

What s the thickest tunic of an artery and a vein?

Answer 33

- arteries = tunica media - veins = tunica externa

Question 34

Capillary type found in the suprarenal glands, spleen, liver and anterior pituitary gland?

Answer 34

Discontinuous capillaries

Question 35

Capillary type found in the GI tract, kidney, and endocrine glands?

Answer 35

Fenestrated capillaries

Question 36

This tunic helps to anchor the vessel to other tissues and provides both support and protection

Answer 36

Tunica externa (tunica adventia)

Question 37

In relation to the heart, where would you find muscular arteries?

Answer 37

Further away from the heart.

Question 38

Name the 3 main classes of blood vessels

Answer 38

- Arteries - Capillaries - Veins

Question 39

What are functional end arteries?

Answer 39

Vessels whose anastomoses are so small that they may be considered tend arteries.

Question 40

What is the most common capillary type?

Answer 40

Continuous capillaries.

Question 41

In relation to the heart, blood flow in veins takes blood where?

Answer 41

Veins transports blood from the body TO the heart.

Question 42

What are the functions of the capillaries?

Answer 42

- To connect arterioles to venules - Allow for rapid gas and nutrient exchange between the blood and the body tissues

Question 43

Arteries of the ______ system carry deoxygenated blood to the lungs?

Answer 43

PULMONARY

Question 44

As an artery's diameter decreases, the amount of elastic fibers ______ and the amount of smooth muscle \_\_\_\_\_\_?

Answer 44

DECREASE, INCREASE

Question 45

What is atherosclerosis?

Answer 45

Fatty deposits and occlusion of the arteries

Question 46

What are anatomical end arteries?

Answer 46

Vessels whose terminal branches to not anastomose.

Question 47

Blood oxygen levels in veins of the pulmonary system are ______ in oxygen?

Answer 47

HIGH

Question 48

In relation to the heart, where would you find elastic arteries?

Answer 48

Closer to the heart.

Question 49

Compare the diameter of the lumen diameter of arteries and veins.

Answer 49

- Arteries are more narrow than veins. - Veins are wider than arteries and often collapsed

Question 50

What is arteriosclerosis?

Answer 50

Hardening of the arteries