Blood leaving the left atrium flows into the left ventricle through this valve.
A protein or other molecule that, when introduced into the body, triggers the production of an antibody.
Chemicals that which prevent certain blood factors from being activated.
The phase of the cardiac cycle in which the heart relaxes between contractions.
Name of the circulation of blood through the coronary blood vessels to deliver oxygen and nutrients to the heart muscle tissue.
The 2 LOWER chambers of the heart.
The human body has a _______ circulatory system where the blood is contained and travels through tubes called blood vessels.
The smallest arteries that still have three tunics.
The _____ circulation moves the blood to the alveoli (air sacs) of the lungs.
The _____ node is located near the tricuspid valve in the right atrium. Initiates the action potentials that cause the heart to beat.
A circulating connective tissue made of plasma, cells, and platelets. (Watery Substance) ----- means life.
The right atrium receives _____ blood from the body.
The large arterial trunk that carries blood from the heart to be distributed by branch arteries through the body.
The node located in the upper portion of the right atrium. Is often called the Pacemaker since it initiates the action potentials that cause the heart to beat.
Gives blood its color. Is composed of four protein chains (called globins), each of which is neatly folded into a particular shape. When it drops off O2, its color darkens. Iron-containing protein in red blood cells that binds oxygen and transports it to the body.
The pulmonary _____ is a large artery that branches into the pulmonary arteries & carries blood to the lungs.
Is an inactive protein, but it plays a critical role when injury occurs. It can be activated to form a blood clot if bleeding occurs.
Flap-like extensions of the atria, seen anteriorly between each atrium and ventricle. Increase the volume of the heart.
White Blood cells that perform defensive functions in blood. Ratio of white blood cells are 700:1.
The phase of the cardiac cycle in which the ventricles contract.