Sheep heart

Base

Superior side, where blood vessels that deliver blood to/from heart are found

Apex

inferior side, pointed portion

Interventricular sulcus

Superficial groove, separates right and left ventricles on outside of heart

Left atrium

upper chamber on left side, receives OXYGENATED blood from lungs

Left ventricle

Lower left chamber, sends OXYGENATED blood to heart + body, largest part, very muscular, pumps the greatest amount of blood

Right atrium

Upper right chamber, receives DEOXYGENATED blood from body tissues

Right ventricle

Lower right chamber, sends DEOXYGENATED from heart to lungs

Coronary artery

Blood vessels, wrap around outside of heart, supplies cardiac muscle tissue with O2

Left and right auricles

Ear-like flaps, top of left and right atria, increases holding capacity of each atrium, increases moveable blood

Aorta

Carries oxygen-rich blood, left ventricle to body, largest blood vessel. splis into multiple artiries; brachiocephalic artery

Pulmonary valves

carries oxygen-rich blood from right ventricle to lungs

Superior and inferior vena cava

oxygen-rich blood INTO right atrium from the body

Interventricular septum

Muscular wall, separates left and right ventricles, prevents O2 and deO2 from mixing

Bicuspid valve

two flapped valve, between left atrium and ventricle, prevents blood backflow into Left atrium

Tricuspid valve

valve with three flaps, between right atrium and ventricle, prevents back flow to right atrium

Aortic valve

between left ventricle and aorta; prevents backflow to left ventricle

Pulmonary valve

between right ventricle and pulmonary artiries, prevents backflow to right ventricle

Papillary muscles

Line the ventricles of the heart, attach at flaps of bicuspid and tricuspid valves by chordae, regulates blood flow to atria

Chordae tendineae

Heart strings