The heart

• author "me"
• tags "Heart"
• description ""
• fileName "The heart"
• freezingBlueDBID -1.0

• Deoxygenated blood from heart to lungs
• Right atrium-->(tricuspid valve)-->right ventricle-->(pulmonary semi-lunar valve) pulmonary trunk-->pulmonary arteries-->capillaries(alveoli) in lungs

Covering of the heart

Outer layer

Inner layer

Middle layer

Space between the parietal and viseral pericardium

Outer layer(corresponds to the viseral pericardium)

Middle layer, the bulk of the heart

Inner layer

Upper chamber

AV valves between the atria and ventricles

Between the right atrium and right ventricle. Prevents backflow of blood from the right ventricle into the right atrium

Between the left atrium and left ventricle. Prevent back up of blood from the left ventricle into left atrium

Prevents backflow of blood from the pulmonary trunk into the right ventricle

Prevents backflow of blood from the aorta into the left ventricle

blood is supplied to the heart by ways of the coronary artery. The first 2 branches of the aorta are the right and left coronary arteries

• first sound: lub
• second sound: dub

SA node(corresponding to the pacemaker of the heart), AV node, AV bundle, purkinje fibers

highest pressure in the heart when the ventricles are contracting. corresponds to 120 in a normal blood pressure

lowest pressure when the ventricles are relaxing. corresponds to the 80 in normal blood pressure. higher than normal blood pressure is called hypertension.

EKG/ECG used to determine the condition of the heart

deoxygenated blood from all body system-->through vena cava-->right atrium-->tricuspid valve-->right ventricle-->pulmonary trunk-->pulmonary artery-->lungs

oxygenated blood from the pulmonary veins to the left atrium-->semilunar valve-->left ventricle-->aortic semi-lunar valve-->aorta-->all body parts