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circulatory system > circulatory system > Flashcards

circulatory system Flashcards

1
Q

what is the circulatory system

A

transport system that allowed cells to
uptake nutrients
excrete waste

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2
Q

how does the transport system require the action of the heart

A

the heart is a muscle that moves blood around body through blood vessels

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3
Q

how does the transport system require the action of blood

A

it’s a fluid tissue that carries nutrients, waste, and other molecules

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4
Q

what is a artery

A

blood vessel that carries blood away from the heart with oxygen
exception: pulmonary artery

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5
Q

what type of walls do arteries have

A

thick, strong and stretchy

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6
Q

what pressure do arteries carry blood at

A

high pressure

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7
Q

what layers r arteries composed of

A

3 layers
outer and inner connective
tissue
middle = muscle fibres & elastic connective tissue

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8
Q

what is a artiole

A

small arteries

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9
Q

what is the diameter of a small artiole regulated by

A

autonomic nervous system

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10
Q

what is vasoconstriction

A

narrowing of blood vessels allowing less blood to tissues

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11
Q

what is vasodilation

A

widening of the blood vessels allowing more blood to tissues

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12
Q

what are capillaries

A

smaller vessels in body
thickness is = to a single cell layer

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13
Q

what do capillaries branch through

A

tissues

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14
Q

what happens in the capillaries

A

cite of gas exchange between blood and tissues via diffusion
RBC past through in single file

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15
Q

veins

A

carry blood towards the heart
exception: pulmonary vein

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16
Q

is the blood carried by veins oxygenated or deoxygenated

A

deoxygenated

17
Q

what type of walls do veins have

A

thin walls

18
Q

are veins high pressure or low

A

low pressure

19
Q

veins blood reservoir

A

65% of total blood volume

20
Q

venules

A

smaller veins where deoxygenated blood collects from capillaries
merges into veins and goes back to heart

21
Q

What is the heart surrounded by

A

Fluid filled membrane (pericardium)

22
Q

Pulmonary circulation

A

Pumps blood from heart to all lungs back to the heart
Deoxygenated blood is pumped from the right side of the heart to the lungs via pulmonary arteries
Blood picks up oxygen and travels to the left side of the heart via pulmonary veins

23
Q

Pulmonary arteries

A

Only group of arteries that carry deoxygenated blood

24
Q

Pulmonary veins

A

Only group of veins that carry oxygenated blood

25
Q

Systemic circulation

A

Flow of blood from heart to body parts, back to the heart
Left side of heart pumps blood to entire body via aorta (largest artery)

26
Q

Systemic circulation starts:

A

Starts in intestines, finishes in liver

27
Q

What are the 2 systemic circulation veins

A

Superior/ inferior vena cava
Return blood to right side of the heart

28
Q

Chambers

A

Each side of heart = 2 muscular chambers = 4 chambers

29
Q

What are chambers separated by

A

A wall called septum

30
Q

2 thin walls in chambers

A

Called atria, recieve blood

31
Q

2 thick walls in chambers

A

Called ventricles and pump blood out of heart

32
Q

Valves

A

Separate atria and ventricles
Blood flows from atria -> ventricles
Attached to papillary muscles by tendons called chordae tendineu

33
Q

What happens when ventricles relax

A

Atrial pressure > vent pressure = valves open

34
Q

What happens when ventricles contact

A

Ventricle pressure > = valves close

35
Q

Mitral valves r on the

A

Left side

36
Q

Tricuspid valves are on the

A

Right side

37
Q

Semilunar valves

A

Separate ventricles and arteries

38
Q

Aortic semi lunar valve

A

Separates left ventricle and Arita

39
Q

Pulmonary semilunar valves

A

Separates right ventricle and pulmonary artery

circulatory system (2 decks)

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