heart

Last updated 2023.03.13 Edit Source

• Biology
• Human body
• Respiration
• Breathing

• center of cardiovascular system
• blood vessels → coronary arteries
• impulse generation and leading system → heartbeat

• right atrium
• right ventricle
• left atrium
• right ventricle

heart valves prevent the backflow of blood

left ventricle → arteries → body capillaries → veins → right atrium

veins transport deoxygenated blood

right ventricle → pulmonary arteries → lung capillaries → pulmonary veins → left atrium

pulmonary veins transport oxygenated blood

1. left and right atria contract
2. left and right ventricles contract (atria relax)
3. both of them relax

average 72/min

volume of blood pumped out from heart in 1 beat

on average: 0.8 dl

blood pressure