Human Anatomy Disection

Pulmonary Artery (dorsal) - Arises from the right ventricle, extends dorsally to the lungs. Large artery that splits into left and right branches. Carries deoxygenated blood from the heart to the lungs for oxygenation. 

Inferior/Superior Vena Cava (ventral) - Superior vena cava is above the right atrium; inferior vena cava is below it. Large veins entering the right atrium. Return deoxygenated blood from the body to the right atrium. 

Pulmonary Veins (more ventral) - Connect lungs to the left atrium. Multiple small veins leading into the heart. Carry oxygenated blood from the lungs to the left atrium. 

Aorta (dorsal) - Arises from the left ventricle, extending dorsally. Thick-walled, largest artery in the body. Carries oxygenated blood from the heart to the rest of the body. 

Right and Left Atrium - Upper chambers of the heart. Thin-walled, right atrium receives blood from the body, left atrium from the lungs. Collect blood before passing it to the ventricles. 

Right and Left Ventricle - Lower chambers of the heart. Thick-walled, left ventricle is most muscular. Pump blood-right ventricle to lungs, left ventricle to body. 

Tricuspid valve - Between right atrium and right ventricle. Three flaps of tissue. Prevents backflow of blood into the right atrium. 

Bicuspid (mitral) valve - Between left atrium and left ventricle. Two flaps. Prevents backflow of blood into the left atrium. 

Aortic valve - Between the left ventricle and aorta. Semilunar valve with three cusps. Prevents backflow of blood into the left ventricle. 

Pulmonary valve - Between right ventricle and pulmonary artery. Semilunar valve with three cusps. Prevents backflow into the right ventricle. 

Spongy Lung Tissue (type of cells?) - Lungs. Soft, porous tissue made of alveoli. Gas exchange - oxygen in, carbon dioxide out. 

Bronchial Tubes - Branching airways inside the lungs. Lined with cartilage and smooth muscle. Carry air from the trachea to alveoli. 

Chordae Tendineae - Inside ventricles, attached to valves. Thin, tendon-like cords. Opens and closes the valve.

Papillary muscles - Inside ventricles, attached to chardae tendineae. Small, nipple-like muscle projections. Contract to keep valves during ventricular contraction.