Circulatory System Flashcards
Circuits
- Lungs
- Body cells
Right
Deoxygenated blood (to heart)
Left
Oxygenated blood (away from heart)
How blood travels
- Pulmonary circulation: right side of the heart and carries blood from the heart to lungs
- Systemic circulation: involves left side and carries blood from heart to the rest of the body
Artery
Thick-walled tubes that send blood AWAY from the heart (usually have oxygenated blood in them)
Capillary
Small tubes with thin walls that deliver blood parts of the body (exchange)
Systemic circulation
Involves left side, carries blood from heart to rest of the body
1. oxygenated blood leaves via arteries
2. blood is delivered to cells at capillaries where oxygen is exchanged for Co2 and de-ox-ed blood
3. goes back to heart via veins
4. then pulmonary circulation
5. repeat
Upper chamber
Atria - receives returning blood
Lower chamber
ventricles - recieves from atria, contracts and forces blood into arteries
Valves
“doors” between atria and ventricles to prevent blood from back-flowing or changing direction
Right atrium
Receives deoxygenated blood from body
Right ventricle
receives deoxygenated blood from right atrium, thin walled, pumps blood into lungs
Left atrium
Receives oxygenated blood from lungs
Left ventricle
Thicker muscular wall, sends oxygenated blood to the body via the aorta
Superior vena cava
large vein that brings deoxygenated blood from upper body to right atrium
