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CVS Physiology > Overview Of CVS > Flashcards

Overview Of CVS Flashcards

1
Q

Enumerate overall functions of CVS

A

Homeostasis
Temperature regulation
Communication function

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2
Q

Mention the two conditions for CVS to control tissue fluid composition

A
  1. Pumping adequate blood flow through tissue capillaries by heart
  2. Conditioning chemical composition of arterial blood by specific organs that add nutrients, oxygen, hormones etc.
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3
Q

Describe temp regulation by CVS

A

By chaning blood flow to skin & mixing/diluting temperature changes

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4
Q

Describe comm function of CVS

A

Hormones are transported from their endocrine glands to target organ by blood stream.

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5
Q

Mention & describe function of heart

A

Pumping function
Compression pump during systole
Suction pump during diastole

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6
Q

Describe function of aorta & big arteries

A

Windkessel function, store some of the blood ejected by the heart during systole & deliver it to organs fownstream by passive recoil during diastole.

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7
Q

Mention function of muscular arteries

A

Distributing function

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8
Q

GR: Capillaries are the most imp component of CVS

A

They are the site of exchange with the fluid bathing the tissue cells.

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9
Q

Describe function of veins

A

Capacitance, by containing most of the circulating blood volume acts as revervoirs of CVS.

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10
Q

Mention aim of systemic & pulmonary circulations

A

S: caapillary exchange in all tissues
P: dry exchange to arterialize venous blood in lungs

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11
Q

Mention rules of blood flow in CVS

A

The fluid blood is continually moving with unidirectional flow in a closed circuit.

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12
Q

Describe blood flow in ventricles, aorta, capillaries & veins.

A

V: intermittent, flow during systole, stopped during diastole.
A: pulsatile with high p at systole, low p at diastole.
C: still pulsatile but small difference
V: steady flow

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13
Q

Importance of pulsatility in capillaries

A

Help homeostasis by mixing up & stirring tissue fluid.

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14
Q

Mention structures arranged in series in CVS

A

Pulmonary & systemic circulations

Components of each circuit

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15
Q

Mention site of parallel arrangement in CVS

A

With both systemic and pulmonary ciculations, vessels supplying different tissues arranged in parallel

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16
Q

Mention advantages of parallel arrangement ofblood vessels

A

Peoper homeostasis, flow through any of systemic organs can be cotrolled, lower peripheral resistance.

17
Q

What happens if organ blood supply was arranged in series?

A

The second & third tissue will recieve blood after passing in other tissues losing some of its O2 and glucose and having waste products.

18
Q

Pressure in left ventricle is …., while in right atrium it is ……

A

120 mmHg

Almost zero

19
Q

The pressure dissipates, overcoming …..

A

Resistance

20
Q

The largest drop in pressure is in ….., from …. to ….. .

A

Arterioles

93 mmHg to 32 mmHg

21
Q

Pressure drop in capillaries is from …. to …..

A

32 mmHg to 10 mmHg

22
Q

In venous system pressure drop is from …. to ….

A

10 mmHg, zero

23
Q

High pressure of arterial side is suitable for …. function, while low pressure of venous side is suitable for….function

A

Filtration

Reabsorption

24
Q

The pressue at the dividing point between arterial and venous side is called …..
Its value is ….

A

Functional capillary pressure

17 mmHg

25
Q

Mentiom components of high pressure sysyem

A

Left ventricle during systole
Aorta, big arteries, distributing arteries
Arterioles
Arterial side of capillaries

26
Q

Mention compnents of low pressure system

A 
Venous side of capillaries
Venules, small veina, large veins and venae cavae
Atria
Pulmonary ciculation
Ventriclea at diastole
27
Q

Velocity is directly proportional to ….. & inversely proportional to …..

A

Blood flow

Total cross-sectional

28
Q

Describe the significance of compliance

A

Relates how volume changea in response to chamge in pressure

CVS Physiology (15 decks)

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