Capillaries & Venous System

Question 1

What blood vessel has very thin walls and is much finer than a human hair?

Answer 1

capillaries - they only allow red blood cells to pass thru the lumen in single file.

Question 2

What blood vessel has very thin walls and is much finer than a human hair?

Answer 2

capillaries - they only allow red blood cells to pass thru the lumen in single file.

Question 3

Capillaries are the smallest blood vessel and consist only of a tunica intima which is comprised of?

Answer 3

endothelium

Question 4

What is the most common type of capillary?

Answer 4

continuous capillaries - found principally in skin & muscles.

Question 5

What capillaries have pores or windows in their endothelium?

Answer 5

fenestrated capillaries - these allow for rapid entry & exit of nutrients & hormones.

Question 6

What capillary is found principally in skin & muscle?

Answer 6

continuous capillaries

Question 7

Which capillaries allow for rapid entry & exit of nutrients & hormones?

Answer 7

fenestrated capillaries - (looks a bit like swiss cheese)

Question 8

Which capillaries are only found in highly specialised tissue such as bone marrow, the liver, spleen & adrenal medulla?

Answer 8

sinusoidal capillaries or sinusoids. they allow large molecules & even blood cells to pass between the blood and surrounding tissue.

Question 9

Which capillaries are only found in highly specialised tissue such as bone marrow, the liver, spleen & adrenal medulla?

Answer 9

sinusoidal capillaries or sinusoids. they allow large molecules & even blood cells to pass between the blood and surrounding tissue.

Question 10

Capillaries are the smallest blood vessel and consist only of a tunica intima which is comprised of?

Answer 10

endothelium

Question 11

What is the most common type of capillary?

Answer 11

continuous capillaries - found principally in skin & muscles.

Question 12

What capillaries have pores or windows in their endothelium?

Answer 12

fenestrated capillaries - these allow for rapid entry & exit of nutrients & hormones.

Question 13

What capillary is found principally in skin & muscle?

Answer 13

continuous capillaries

Question 14

Which capillaries allow for rapid entry & exit of nutrients & hormones?

Answer 14

fenestrated capillaries - (looks a bit like swiss cheese)

Question 15

Which capillaries have large irregularly shaped lumens & are often fenestrated?

Answer 15

sinusoidal capillaries or sinusoids.

Question 16

Which capillaries are only found in highly specialised tissue such as bone marrow, the liver, spleen & adrenal medulla?

Answer 16

sinusoidal capillaries or sinusoids. they allow large molecules & even blood cells to pass between the blood and surrounding tissue.

Question 17

What is formed when capillaries unite?

Answer 17

venules (little veins).

Question 18

What are the smallest venules called?

Answer 18

postcapillary venules - they consist entirely of endothelium and are very porous.

Question 19

Venules join up to form ?

Answer 19

veins

Question 20

Veins are much thinner than ……. as the blood flowing thru veins is under low pressure.

Answer 20

arteries

Question 21

veins have ……. which prevent blood from flowing backward as it is pumped upward toward the heart.

Answer 21

valves

Question 22

Which veins are located deep within muscle tissue in the body or limb?

Answer 22

deep veins - they usually have a corresponding artery alongside them. e.g. femoral vein is bside the femoral artery.

Question 23

Which veins carry the vast majority of blood in the venous system?

Answer 23

deep veins

Question 24

Which veins are closer to the surface of the body?

Answer 24

superficial veins - these veins do not have corresponding arteries.

Question 25

What is an important role of the superficial veins?

Answer 25

cooling the body. when the body gets too hot, blood is moved from the deep veins to the superficial veins to allow heat to escape the body.

Question 26

Which smaller veins link larger veins?

Answer 26

communicating veins

Question 27

The veins that link the deep veins to the superficial veins are called?

Answer 27

perforator veins

Question 28

What are the veins that take the deoxygenated blood back to the heart classified as?

Answer 28

systemic veins

Question 29

What are the veins that carry oxygenated blood from the lungs to the heart classified as?

Answer 29

pulmonary veins - takes oxygenated blood from lungs back to the heart (left side)

Question 30

What is the largest vein in the body?

Answer 30

venae cavae (plural vena cava)

Question 31

Which vein is located in the upper chest region?

Answer 31

superior vena cava. (SVC)

Question 32

Which veins join to form the superior venae cavae (SVC)?

Answer 32

brachiocephalic veins

Question 33

Which veins bring deoxygenated blood from the head, neck, arm & chest regions of the body to the right atrium?

Answer 33

superior vena cava

Question 34

Which vein is located posterior to the abdomincal cavity & travels along the spine to the heart?

Answer 34

inferior vena cava

Question 35

Which veins join to form the inferior vena cava?

Answer 35

common iliac veins

Question 36

Which veins bring deoxygenated blood from thee lower body regions (legs, back, abdomen & pelvis) to the right atrium?

Answer 36

inferior vena cava