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Chambers in the hear where blood flows from the veins to ventricles. Conctraction here adds to ventricular filling but is not essential for it
Chambers whose contractions produce the pressures that drive blood through the pulmonary and systemic vascular systems and back to the heart
Components of the vascular system
Low-resistance tubes conducting blood to the various organs with little loss in the pressure. They also act as pressure reservoirs for maintaining blood flow during ventricular relaxation
Major sites of resistance to flow; responsible for the pattern of blood-flow disrtibution to the various organs; participate in the regulation of arterial blood pressure
Major sites of nutrient, meabolic end product, and fluid exchange between blood and tissues
Sites of nutrient, metabolic end product, and fluid exchange between blood and tissues
Low-resistance conduits for blood flow back to the heart. Their capacity for blood is adjusted to faciliate this flow
Liquid portion of blood that contains dissolved nutrients, ions, wastes, gases, and other substances. Its composition equilibrates with that of the interstitual fluid at the capillaries
What are the two circuits that make up the circulatory system?
- 1) Pulmonary Circulation: from the right ventricle to the lungs and then to the left atrium
- 2)Systemic Circulation: Left ventricle to all peripheral organs and tissues and then to right atrium
Where does the superior vena cava colelct blood from?
HEad, NEck, Upper limbs, thorax
Where does the inferior vena cava collect blood from?
Abdomen, pelvis, lower limbs
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