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Flashcards in deck_2698133-3 Deck (16)
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1
Q

4 key functions of the circulatory system

A

1) transports and delivers O2 and nutrients to the cells in exchange for CO2 and waste materialsnutrients: minerals, vitamins, glucose2) transports and delivers chemical messengers throughout the bodychemical messenger: hormones3) regulates body temperature 4) defends against disease

2
Q

3 major components of the circulatory or cardiovascular system

A

heartblood vesselsblood

3
Q

in which direction is blood pumped? - from veins to arteries or- from arteries to veins

A

from arteries to veins

4
Q

does the veins keep the blood moving in one direction?

A

yes

5
Q

what connects arteries to veins

A

capillaries

6
Q

are heart, arteries and veins all connected?

A

yes

7
Q

cardiac output definition

A

volume of blood pumped by the heart PER minute

8
Q

the greater the value of cardiac output (4)

A
  • the better the heart as a pump- the stronger the heart is as a muscle - the more fit the person is - the bigger the value of stroke volume
9
Q

how to determine cardiac output

A

(stroke volume x heart rate)

10
Q

stroke volume definition (2)

A
  • volume of blood pumped by heart PER beat- The quantity of blood pumped from the hearts left ventricle during each contraction PER beat
11
Q

average stroke volume of adult …- male - female

A
  • male is 70 mL / beat- female is 60 mL / beat
12
Q

the greater the value of stroke volume…(4)

A
  • the lower the value of RHR- the better the heart as a pump- the stronger the heart is as a muscle- the more fit the person is
13
Q

RHR definition (1)

A

of contraction of the heart that occur PER minute while the body is at a complete rest

14
Q

Heart rate definition

A
  • how many times the heart beats PER minute
15
Q

Why does the heart rate vary?

A

The heart rate can vary according to the body’s physical needs, including the need to absorb oxygen and excrete carbon dioxide

16
Q

What determines how effective the heart is as a pump

A
  • stroke volume (big value)-cardiac output (big value)resting heart rate (small value