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A white blood cell; typically functions in immunity, such as phagocytosis or antibody production.
Colorless watery fluid of blood and lymph containing no cells and in which erythrocytes and leukocytes and platelets are suspended.
Iron-containing protein in red blood cells that transports oxygen from the lungs to the tissues of the body.
Formation and development of red and white blood cells from stem cells. Occur in bone marrow.
Blood having abnormally low oxygen carrying capacity, due to a reduced number or size of the red blood cells.
A disorder characterized by an abnormal increase in the number of red blood cells in the blood.
A substance produced by the mucosa of the stomach and intestines that is essential for the absorption of vitamin B12.
A group of leukocytes containing granules in their cytoplasm; neutrophils, eosinophils, basophils.
The most abundant type of white blood cell. They are phagocytic and tend to self-destruct as they destroy foreign invaders, limiting their life span to a few days.
White blood cell that are responsible for combating infection by parasites in vertebrates.
An agranular leukocyte that is able to migrate into tissues and transform into a macrophage.
Antigens formed on the surface of red blood cells, whose presence and structure are genetically determined.
Upper chamber of the heart that receives and holds blood that is about to enter the ventricle.
The largest artery in the body; the large trunk artery that carries blood from the left ventricle of the heart to branch arteries.
Largest vein in the body; either of two large veins that return oxygen-depleted blood to the right atrium of the heart.
One of two arteries (branches of the pulmonary trunk) that carry venous blood from the heart to the lungs.
Any of four veins that carry arterial blood from the lungs to the left atrium of the heart.
Severe form of anemia that develops as a consquences of loss of functioning red bone marrow.
Progressive anemia that results from a lack of intrinsic factor essential for the absorption of vitamin B12.
Disorder that results from the incompatibility of a fetus with an Rh-positive blood factor and a mother who is Rh negative, causing red blood cell destruction in the fetus; this condition necessitates a blood transfusion to save the fetus.
Picks up electrical impulse from the SA node and causes ventricles to contract, causing blood to move into arteries
Bundle of His
A bundle of modified heart muscle that transmits the cardiac impulse from the atrioventricular node to the ventricles causing them to contract.
"Heart strings" are tiny white collagenic cords that anchor the cusps to the ventricular walls. They originate from the papillary muscles.
The blood pressure during that part of the heartbeat when the hearts venticles are relaxing.
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