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10 notecards = 3 pages (4 cards per page)

Viewing:

Chapter 18: The Heart

front 1

Describe the size, shape, location, and orientation of the heart in the thorax.

back 1

Size: fist, weighs less than a pound
Shape: broad, flat base (9cm) and apex points toward left hip
Location: frontal plane, between lungs, most mass is on left, but projects out more to right to balance the heart
Orientation: rests on superior surface of diaphragm, anterior to vertebral column, posterior to sternum

front 2

Coverings of the heart.

back 2

Fibrous Pericardium
Serous Pericardium

front 3

Fibrous Pericardium

back 3

Structure: superficial part of double-walled sac surrounding the heart; consists of dense connective tissue
Function: (1) protects heart (2) anchors it to surround structures (3) prevents overfilling of heart with blood

front 4

Serous Pericardium

back 4

parietal: lines internal surface of fibrous pericardium; attaches to large arteries exiting the heart
visceral (epicardium): thin membrane that continues over the external heart surface

front 5

Pericardial Cavity

back 5

between the parietal and visceral layers; slitlike cavity that contains a film of protein-rich fluid

front 6

Stroke Volume (SV)

back 6

Amount of blood ejected by one contraction of the heart.

front 7

End Diastolic Volume (EDV)

back 7

Amount of blood in the ventricle at the end of relaxation

front 8

End Systolic Volume (ESV)

back 8

Amount of blood in the ventricle at the end of contraction

front 9

Cardiac Output (CO)

back 9

The amount of blood ejected from the heart in one minute

front 10

Heart Rate (HR)

back 10

The frequency at which the heart beats