The pressure of the blood against the inner walls of the blood vessels

A dividing wall in an animal structure

Any of the gland like masses of tissue that contain the cell that become lymphocytes

The vessels that transport the blood from the body to the heart

A vein that transports oxygenated blood from the lungs to left atrium of the heart

The contraction of the heart that forces the blood out

The breastbone

Blood that has flowed through the body and is returning to the lungs

The dilatation of the heart during which the chambers fill with blood

Red blood cells

The area of the heart that creates the electrical impulses; stimulating the heart to beat

The two lower chambers on each side of the heart that receive blood from the atria and in turn force it into the arteries

A small mass of fibers between the atria that conducts the impulse received from the sinoatrial node.

White blood cell

The liquid part of blood or lymph

The artery that transports blood from the right ventricle of the heart to the lungs

A blood vessel that transports blood from the heart to the body

A membranous flap that controls the flow of blood allowing it to flow in only one direction

The insoluble protein product of blood coagulation

The number of heart beats per minute

The two upper chambers on each side of the heart

Minute bodies in blood that aid in coagulation

A test that checks for problems with the electrical

activity of your heart

A clear yellowish liquid transported to the bloodstream by the lymphatic vessels

Blood that has been exposed to oxygen in the lung