Name and function of a structure of heart.

Be able to identify the name and function of a structure of the heart when given a description, picture or physical specimen to reference.

Atria

upper two chambers

Ventricles

lower two chambers

Epicardium

outer layer of the wall of the heart

Myocardium

muscular middle layer of the wall of the heart

Endocardium

inner layer of the heart

Atrioventricular Bundle

bundle of fibers that carry cardiac impulses

Atrioventricular Node

section of nodal tissue that delays and relays cardiac impulses

Diastole phase

heart ventricles are relaxed and the heart fills with blood

Systole phase

ventricles contract and pump blood to the arteries

Aortic valve

prevents the backflow of blood as it is pumped from the left ventricle to the aorta.

Mitral valve

prevents the backflow of blood as it is pumped from the left atrium to the left ventricle

Pulmonary valve

prevents the backflow of blood as it is pumped from the right ventricle to the pulmonary artery

Tricuspid valve

prevents backflow of blood as it is pumped from the right atrium to the right ventricle

Pulmonary circulation

Blood traveling to lungs for oxygen (picks up O2 and releasesCO2)

Key structures: right side of heart, lung, pulmonary arteries & veins

Systemic circulation

Blood traveling to the rest of the body

Key structures: left side of heart, aorta, superior and inferior vena cava

Coronary circulation

Supplies heart with blood & nutrients

Key structures: left coronary arteries, cardiac veins