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Bio > Heart > Flashcards

Heart Flashcards

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Biology 101 flashcards
1
Q

Vena carva

A

Deoxygenated blood from body to RA

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2
Q

Pulmonary vein

A

Carries oxygenated blood lungs to LA

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3
Q

Structure of atrias

A

Thinner muscular wall - only deliver blood to ventricles so don’t have to contract as forceful
Elastic walls stretch as full up with blood

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4
Q

Ventricles structure

A

LV thicker muscular wall then RV deliver blood to respiring cells contract more forcefully

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5
Q

Cardiac muscle

A

Walls of heart have a thick muscular layer
Heart = myogenic contract and relax without stim
Never fatigues as long as has oxygen

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6
Q

Coronary arteries

A

Supply cardiac muscle with oxygenated blood
If become blocked = heart attack

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7
Q

Name two veins in the heart

A

Pulmonary vein
Vena carva

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8
Q

Name two arteries in heart

A

Pulmonary artery
Aorta

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9
Q

Pulmonary artery

A

Deoxygenated blood from RV to lungs to become oxygenated

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10
Q

Aorta

A

Oxygenated blood from LV to rest of the body

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11
Q

Name two valves

A

Semi lunar
Atrioventricular

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12
Q

Role of valves

A

Prevent back flow of blood
Open when pressure higher behind valve
Close when pressure is higher in front

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13
Q

Septum

A

Separate deoxygenated blood and oxygenated blood
Maintains high conc of oxygen

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14
Q

Arterioles

A

Smaller than arteries connect to capillaries

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15
Q

Capillaries

A

Connect the arterioles to veins

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16
Q

Veins

A

Carry blood back into heart

17
Q

Artery

A

Carry blood away from heart

18
Q

Arteries vs veins

A

Muscle layer Thicker vs thinner

Elastic layer
Thicker walls can stretch and recoil vs thinner - lower pressure

Wall thickness
Thicker - prevent vessels from bursting due to high pressure vs thinner low pressure

Valves
No vs yes

Lumen
Smaller vs winder

19
Q

Capillaries

A

One cell thick provide short diffusion pathway
No valves
No muscle layer
No elastic layer

20
Q

Diastole

A

Atria + ventriclar muscle relaxed
Blood travels down vena cava to atria
Blood flow into atria increases the pressure

21
Q

Atrial systole

A

Atria muscle contracts increases pressure
AV valves open and blood flow into ventricles
Ventricular walls relaxed

22
Q

Ventricular systole

A

Short delay
Ventricle muscular walls contract increases pressure
AV valve close semi lunar valve open
Blood pushed out ventricles into arteries

23
Q

Cardiac output

A

Cardiac output = heart rate x stroke vol

Bio (14 decks)

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