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Bio 2 > THE HEART > Flashcards

THE HEART Flashcards

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Biology 101 flashcards
1
Q

The right side of the heart receives what kind of blood

A

oxygen-poor blood

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2
Q

The left side of the heart receives what kind of blood

A

oxygen-rich blood

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3
Q

Blood vessels of the _____________ are the ones that carry blood to and from the lungs.

A

pulmonary circuit

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4
Q

The blood vessels that carry blood to and from all body tissues form the ________________.

A

systemic circuit

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5
Q

Right side: receives oxygen-poor blood from ____________ and then sends this blood to the _____ to pick up oxygen and remove carbon dioxide

A

Body tissues

lungs

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6
Q

Left side: receives the oxygenated blood returning from the _______ and pumps this blood throughout the body to supply oxygen and nutrients to ________

A

lungs

body tissues

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7
Q

The receiving chambers

A

The right and left atria

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8
Q

The pumping chambers

A

The right and left ventricles

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9
Q

The right atrium receives blood returning from the _________

A

systemic circuit

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10
Q

The left atrium receives blood returning from the _________

A

pulmonary circuit

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11
Q

The right ventricle pumps blood into the __________

A

pulmonary circuit

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12
Q

The left ventricle pumps blood into the ___________

A

systemic circuit

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13
Q

describe the heart in 3 words

A

fist, hollow, cone

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14
Q

mass of heart

A

250 g to 350 g (less than a pound)

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15
Q

the heart is enclosed within

A

the medial cavity of the thorax mediastinum

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16
Q

the apex of the heart points inferiorly towards what?

A

the left hip

17
Q

If you press your fingers between the fifth and sixth ribs just below the left nipple, you can easily feel the ___________ caused by your beating heart’s apex where it touches the chest wall.

A

apical impulse

18
Q

the double walled sac that encloses the heart.

A

pericardium

19
Q

what are the 2 layers of the pericardium

A

fibrous pericardium and serous pericardium

20
Q

The loosely fitting superficial part of this sac

A

fibrous pericardium

21
Q

describe fibrous pericardium

A

tough and dense connective tissue layer

22
Q

what are the 3 things the fibrous pericardium does

A

protects the heart
anchors it to surrounding structures
prevents overfilling of the heart with blood

23
Q

Deep to the fibrous pericardium, a thin, slippery, two-Layered serous membrane that forms a closed sac around the heart.

A

serous pericardium

24
Q

the serous pericardium is made up of 2 layers what are they

A

parietal and visceral layer

25
Q

lines the internal surface of the fibrous pericardium

A

parietal layer

26
Q

the epicardium, an integral part of the heart wall.

A

visceral layer

27
Q

Between the parietal and visceral layers

A

pericardial cavity

28
Q

Pericardial cavity: contains a film of

A

serous fluid

29
Q

The serous membranes, lubricated by the fluid, glide smoothly past one another, allowing the mobile heart to work in a relatively ___________

A

friction free environment

30
Q

At the superior margin of the heart, the ________ attaches to the large arteries exiting the heart, and then turns inferiorly and continues over the external heart surface as the _________

A

parietal layer

visceral layer

31
Q

what are the 3 layers of the heart wall

A

Superficial epicardium
Myocardium
Endocardium

32
Q

is the visceral layer of the serous pericardium. It is often infiltrated with fat, especially in older people.

A

superficial epicardium

33
Q

Myocardium: the ____ layer, composed mainly of ________ and forms the _______ of the heart. This is the layer that ______.

A

middle
cardiac muscle
bulk
contracts

34
Q

The branching cardiac muscle cells are tethered to one another by criss crossing connective tissue fibers and arranged in spiral or circular ______. These ________ effectively _____ all parts of the heart together.

A

bundles
interlacing bundles
link

35
Q

The connective tissue fibers form a dense network, the __________, that ______ the myocardium internally and ______ the cardiac muscle fibers. This network of _____ and ______ is thicker in some areas than others.

A 
fibrous cardiac skeleton
reinforces
anchors
collagen 
elastic fibers

Bio 2 (14 decks)

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