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Biology > Circulation > Flashcards

Circulation Flashcards

1
Q

Layers of the heart

A

Outer = Epicardium
Middle = Mycocardium
Inner = Endocardium

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2
Q

Myocardial layer contains

A

Contractile elements

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3
Q

Heartstrings

A

Chordae Tendinae

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4
Q

Systole diastole

A

Systole = Contraction of ventricles
Diastole = Relaxation of ventricles (Dark souls = relax)

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5
Q

One complete heart cycle takes

A

0.8 seconds

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6
Q

Bicuspid or _____ valve

A

Mitral
Left

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7
Q

Lub dub

A

lub = beginning of systole
dub = beginning of diastole

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8
Q

Layers of arteries

A

Outer = tunica externa (loose fibrous tissue)
middle = tunica media (smooth muscle)
inner = tunica interna (endothelial)

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9
Q

Network of small arteries that supply blood to big arteries

A

Vasa vasorum

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10
Q

Tunica interna

A

Simple squamous epithelium and areolar connective tissue

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11
Q

Arterioles diameter

A

3mm to 10 micrometers

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12
Q

RBC size

A

7 micrometers

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13
Q

Veins layers different. how?

A

Middle layer thinner

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14
Q

Most of volume of blood is contained

A

in veins

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15
Q

Pressures in arteries and veins

A

arteries = 100mmHg
Veins = 5-10 mmHg

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16
Q

Venules diameter

A

8-100 micrometers

17
Q

Capillaries amount in body

A

60000 miles and
800-1000m² surface area

18
Q

Volume of blood in human body

A

5 Liters

19
Q

Blood flow at rest vs exercise

A

Heart: 250 to 750
Muscles: 1000 to 12,500
Skin: 400 to 1900

20
Q

Healthy bp

A

120/80

21
Q

Arteries bp
arterioles bp

A

arteries 102/60
arterioles 60/45

22
Q

Capillaries venules veins bp

A

Cappilaries 40
venules 20
veins 10

23
Q

High pressure arterial baroreceptors are present in

A

aortic arch and carotid sinuses

24
Q

Hodgkins disease

A

Enlargement of lymph nodes in neck

Biology (18 decks)

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