Circulatroy system Flashcards

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1
Q

What is the names of the lower chambers

A

ventricles

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2
Q

What is the name of the upper chambers ?

A

atriums

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3
Q

What is the job of the ventricles

A

pump blood through the body

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4
Q

What is the function of the valves in the heart

A

Prevent backflow

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5
Q

Describe a atrium

A

Thin muscular wall to push blood into lower chamber

Right side receives blood from the body through the vena cava ( Deoxygenated )

receives blood form the lungs through the pulmonary vein ( Oxygenated )

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6
Q

Describe the ventricles

A

Thick muscular wall , Lv a lot thinner

Right ventricle sends blood to lungs through pulmonary artery

Left ventricle sends blood to whole body via aorta which splits into smaller arteries

Wall made of special cardiac muscle ( regulates contraction )

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7
Q

What is in blood

A

55 % plasma

1 % white blood cells

45 % red blood cells

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8
Q

Artery ?

A

Take blood from the heart to the lungs

thick muscle

small blood channel

high pressure

no valves

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9
Q

Capillary ?

A

Exchange surface

1 cell thick

Big lumen

Pressure start high end low

no valves

Takes blood from the artery to the vein

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10
Q

Vein ?

A

Takes blood to the heart

Thin muscle with elastic fibres

Wide lumen

low pressure

Valves to prevent back flow

Takes blood towards the heart

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