Capillaries & Venous System Flashcards

(36 cards)

1
Q

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

A

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

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2
Q

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

A

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

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3
Q

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

A

endothelium

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4
Q

What is the most common type of capillary?

A

continuous capillaries - found principally in skin & muscles.

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5
Q

What capillaries have pores or windows in their endothelium?

A

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

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6
Q

What capillary is found principally in skin & muscle?

A

continuous capillaries

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7
Q

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

A

fenestrated capillaries - (looks a bit like swiss cheese)

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8
Q

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

A

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

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9
Q

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

A

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

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10
Q

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

A

endothelium

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11
Q

What is the most common type of capillary?

A

continuous capillaries - found principally in skin & muscles.

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12
Q

What capillaries have pores or windows in their endothelium?

A

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

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13
Q

What capillary is found principally in skin & muscle?

A

continuous capillaries

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14
Q

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

A

fenestrated capillaries - (looks a bit like swiss cheese)

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15
Q

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

A

sinusoidal capillaries or sinusoids.

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16
Q

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

A

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

17
Q

What is formed when capillaries unite?

A

venules (little veins).

18
Q

What are the smallest venules called?

A

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

19
Q

Venules join up to form ?

20
Q

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

21
Q

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

22
Q

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

A

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

23
Q

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

24
Q

Which veins are closer to the surface of the body?

A

superficial veins - these veins do not have corresponding arteries.

25
What is an important role of the superficial veins?
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.
26
Which smaller veins link larger veins?
communicating veins
27
The veins that link the deep veins to the superficial veins are called?
perforator veins
28
What are the veins that take the deoxygenated blood back to the heart classified as?
systemic veins
29
What are the veins that carry oxygenated blood from the lungs to the heart classified as?
pulmonary veins - takes oxygenated blood from lungs back to the heart (left side)
30
What is the largest vein in the body?
venae cavae (plural vena cava)
31
Which vein is located in the upper chest region?
superior vena cava. (SVC)
32
Which veins join to form the superior venae cavae (SVC)?
brachiocephalic veins
33
Which veins bring deoxygenated blood from the head, neck, arm & chest regions of the body to the right atrium?
superior vena cava
34
Which vein is located posterior to the abdomincal cavity & travels along the spine to the heart?
inferior vena cava
35
Which veins join to form the inferior vena cava?
common iliac veins
36
Which veins bring deoxygenated blood from thee lower body regions (legs, back, abdomen & pelvis) to the right atrium?
inferior vena cava