Blood Circulatory System (4)

Science

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Structure of right ventricle

Has thick muscular wall

Structure of left atrium

Has thin muscular wall

Structure of left ventricle

Has the thickest muscular wall

Structure of septum

Septum is the muscular wall which separates the left side of the heart from the right side of the heart

Function of septum

Prevents oxygenated blood from mixing with deoxygenated blood

Types of human blood vessels

- Arteries - Capillaries - Veins

Structure of vein (1)

Thin, less muscular and less elastic wall to facilitate blood flow under low blood pressure

Structure of vein (2)

Has no valves

Structure of vein (3)

Has large lumen

Function of vein (1)

Transports deoxygenated blood back to the heart from the whole body except the lungs

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