kin test 3 Flashcards
physiology
what are the main functions of the cardiovascular system
- delivery of oxygen, fuel, and other dissolved substancs to the tissues of the body
- the removal of CO2 and othewr waste products from the tissues
- thermoregulation
- prevention of infections
whats the right side of the circulatory system job
deals with deoxygenated blood
whats the left side of the circulatory system job
deals with oxygenated blood
whats the lub heart sound?
closing of the A-V valves
whats the dub heart sound?
closing of the semilunar valves
artery?
- carries blood AWAY from the heart
- has thick muscles and elasticx fibres that contract to push blood along
vein?
- carry blood TOWARDS the heart
- have thin muscles and elastic fibers
- have valves which acft to stop blood fro going in the wrong direction
capillary?
- link artieries with veins
- one cell wall thick
- a collection of capillaries is known as a capillary bed
red blood cells
- without a nucleus
- ## contain hemoglobins a moleculoe specifcally designed to hold 02 and carry it to cells that need it
White blood cells
- contain a nuclues and 2 main types
- lymphocytes and macrophages
platelets
- bits of cells broken off larger cells
- produce tiny fibrinogen fibres to form a net , this net trraps other blood cells to form a BLOOD CLOT
plasma
- a strasw colouyred liquid that carries the cells and the platelets
blood pressure(BP)
a measurment of the force of blood outward on the artery wall(mmHg)
heart rate(HR)
the number of times the heart beats in one minute(b/min)
stroke volume(SV)
the amount of blood pumped out by the ventricles per heart beat(L/beat)
cardiac output(Q)
The amount of blood pumped out by the heart in one minute(HRxSV)
list the short term effects that effect HR and BP
- activity level
- emotions
- water/food intake
- other chemicals
list the long term effects on HR and BP
- lower resting HR
- increase in size amd number of capillaries
- increase in size and elasticity of artieres
- increase hemoglobins in RBDC’S
- increase colaterall circulation