The cardiovascular system
Terms in this set (45)
Primary functions of the heart
pump deoxygenated blood from tissue to lungs
pump oxygenated blood to the body tissue for energy
Chambers of the heart
atrium (upper) and ventricles (lower)
wall that divides the chambers of the heart.
receive blood entering the heart and feed it to the ventricles
distribute to the lungs and body
attached to the heart and carry blood away from the heart (pulmonary and aorta)
carry blood into the heart (vena cava and pulmonary vein)
transportation of blood between the heart and lungs
transportation of blood between the tissues of the body and the heart
a complete heartbeat and the pathway taken by the blood as a consequence
The beating pumping phase of the heartbeat
The relaxing filling phase of the heartbeat
enters the right atrium via the inferior and superior vena cava passes through the one way valve and into the right ventricle. Blood is ejected to the lungs via the pulmonary artery.
enters the atrium via the pulmonary vein, passes through the one-way valve and into the left ventricle into the aorta for transportation to the bodies tissues.
superior vena cava
inferior vena cava
branch off from the left side of the heart at the root of the aorta, deliver oxygenated blood to the hearts muscular wall
collect deoxygenated blood from the hearts muscular walls and return this to the pulmonary artery where its delivered back to the lungs for oxygenation.
Resting Heart Rate
Maximum Heart Rate
220 - Age
ACSM recommended exercise up to 55-90% of max HR
Systolic 120 Diastolic 80
Pre hypertension BP
Systolic 120-139 Diastolic 80-89
Stage 1 Hypertension
Systolic 140-159 Diastolic 90-99
Stage 2 Hypertensions
Systolic >160 Diastolic >100
Factors affecting blood pressure
diet, smoking, stress, genetic factors.
sustained and elevated blood pressure
volume of blood ejected from the heart with each beat
Stroke volume X Heart rate
measure of efficiency of the cardiovascular system
vessel walls stretching due to increased heart rate and blood pressure
smooth muscle in vessel narrows and contracts reducing the volume of blood which can pass through. forces blood to divert to active areas.
smaller and narrower branches of the arteries reducing the speed at which the blood enters the tissue area
narrowest and thinnest blood vessels which saturate all living tissues. This is where gaseous exchange takes place
process where one way valves return blood back to the heart by the action of the skeletal muscles. muscle tissue surrounding the external walls push blood against gravity towards the heart.
contains electrolytes hormones and fats
red blood cells
produced in the marrow of the bone responsible for transportation of oxygen. contain haemoglobin
white blood cells
used to fight infection and bacteria in the body.
made from protein capable of transporting for molecules of oxygen