Circulatory System Key Terms

Also known as cardiovascular system. Referred to as the "transportation" system of the body. Consists of heart, blood vessels, and blood.

• Lymphatic system

• Circulatory system

• Respiratory system

• Capillaries

Smooth layer of cells that lines the inside of the heart and is continuous with the inside of blood vessels

• Myocardium

• Pericardium

• Septum

• Endocardium

Middle, muscular layer of the heart.

• Endocardium

• Myocardium

• Pericardium

• Septum

Double layered membrane, or sac, that covers the outside of the heart

• Endocardium

• Myocardium

• Pericardium

• Septum

Muscular wall that separates the heart into a right side and a left side

• Endocardium

• Pericardium

• Septum

• Myocardium

Receives blood as it returns from the body cells

• Right atrium

• Left atrium

• Right ventricle

• Left ventricle

Receives blood from the right atrium and pumps the blood into the pulmonary artery, which carries the blood to the lungs for oxygen

• Right atrium

• Right ventricle

• Left atrium

• Left ventricle

Receives oxygenated blood from the lungs

• Right atrium

• Right ventricle

• Left atrium

• Left ventricle

Receives blood from the left atrium and pumps the blood into the aorta for transport to the body cells

• Right atrium

• Right ventricle

• Left atrium

• Left ventricle

Located between the right atrium and right ventricle

• Tricuspid valve

• Bicuspid valve

• Pulmonary valve

• Aortic valve