3 components of the circulatory system

3 types of blood vessels

Arteries

Veins

Capillaries

Tough, inelastic protein (fibre) in arteries and veins

Middle layer in arteries and veins

Inner single layer of living cells surrounding the lumen/hollow core (epi = above, so under/inside = ?)

Capillary walls are ___________ and are made of ______

Blood pressure

Function of valves

systolic

diastolic

average systolic pressure

average diastolic pressure

Location of the heart

Muscle of the heart

Double membrane surrounding the heart

Fluid in the pericardium

What type of pump is the heart?

Which ventricle is thickest?

Wall that divides the heart

Four chambers of the heart

Thickness of walls in the atria

Tough chords / heart strings

Tendons are attached to the heart wall by projections called

Valve on the right side of the heart

Valve on the left side of the heart

Valve that allows blood to flow into the pulmonary artery

Valve that allows blood to flow into the aorta

Deoxygenated blood enters the heart through the

Deoxygenated blood flows out of the heart to the lungs through the

Oxygenated blood enters the heart through the

The oxygenated blood flows out of the heart and around the body through the

The cardiac muscle is supplied with blood from the

two circuits

Pulmonary circuit

Systemic circuit

Heartbeat is controlled by the

What is the pacemaker and where is it located?

The pacemaker sends out

AV node

function of the pacemaker

A record of the electrical activity of the heart

Nerves connecting the pacemaker to the brain (one reduces rate of heartbeat, the other increases)

SA node / pacemaker

noise made when the bicuspid and tricuspid valves close

noise made when the semilunar valves close

filling phase

emptying phase

Exercise