The Cardiorespiratory System Flashcards

1
Q

Cardiac cycle

A

The sequence of events in one beat of the heart

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2
Q

What is a normal resting heart rate?

A

60-90 bpm

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3
Q

cardiac hypertrophy

A

the muscular walls of the left ventricle can sometimes increase in size

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4
Q

stroke volume

A

the amount of blood pumped out of the ventricle per min

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5
Q

Cardiac output

A

the amount of blood pumped out by the ventricles in 1 min

stroke volume x heart rate

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6
Q

blood pressure

A

the amount go pressure that is exerted on the walls of the blood vessels as blood moves through them

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7
Q

typical blood pressure

A

120/80mmHg

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8
Q

What does the first and second number in blood pressure represent

A

the first number represents the highest level blood pressure reaches when the heart contracts

the second number represents the lowest level blood pressure

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9
Q

arteries

A

carry blood away from the heart to capillaries

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10
Q

veins

A

carry blood under low pressure from capillaries back to the heart

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11
Q

venous return

A

amount of blood returned to the heart by the veins

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12
Q

capillaries

A

carry blood from arterioles to venues

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13
Q

diffusion

A

movement of molecules from an area of greater concentration to an area of lesser concentration

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14
Q

gaseous exchange

A

diffusion that occurs in the exchange of gases within the lungs

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15
Q

pulmonary circulation

A

the flow of blood from the right side of the heart to the lungs and then back to the left side of the heart

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16
Q

systemic circulation

A

the flow of blood from the left side of the heart to all parts of the body and then back to the right side of the heart

the left ventricle pumps blood via the aorta into the arteries arteries and capillary network throughout the body

17
Q

breathing action

A

diaphragm flattens when it contracts, increasing the capacity of the chest cavity