Cardio 1 Flashcards
primary roles of the circulatory system
distribution of dissolved gases and other molecules for nutrition, growth and repair, while simultaneously removing cellular wastes
three basic functional parts of circulatory system
heart, blood, vessels
Dr. Willian Harvey
showed that in one hour the heart pumped your entire body weight of blood and that there was no way the liver could constantly produce that much blood
Transport in the circulatory system can be divided into three types:
- materials entering the body
- materials moved from cell to cell
- materials leaving the body
arteries
carry blood away from the heart
veins
carry blood back to the back
capillaries
links arteries and veins
Liquids and gases commonly flow……
down pressure gradients
The initial region of high pressure in the cardiovascular system is created by…
contraction of the heart
as blood flows through the vessels….
pressure is lost due to friction
pressure is commonly measured in..
mm Hg
hydrostatic pressure
pressure exerted by gravity downward on the floor of the container as well as on the sides
pressure gradient is created through…
contraction of the ventricles
flow is based on…. not….
volume, velocity
flow
volume of blood that passes a given point in system per unit of time; proportional to pressure gradient and inversely proportional to resistance
