Apologia -- The Human Body: Fearfully and Wonderfully Made! Module 11: The Circulatory System

Vocabulary from Module 11 of Apologia Educational Ministries' The Human Body: Fearfully and Wonderfully Made! by Dr. Jay Wile and Marilyn M. Shannon, M.A.
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Viscosity
The resistance to flow and alteration of shape due to cohesion
Plasma
The fluid portion of the blood, which is mostly water
Formed elements of blood
The cells and cell parts of blood produced by the bone marrow
Erythrocytes
Red blood cells which carry the oxygen in blood
Leukocytes
White blood cells which perform various defensive functions in blood
Platelets
Cell fragments in blood which help prevent blood loss
Diapedesis
Passage of any formed element of blood through the blood vessel and into the tissue spaces
Chemotaxis
Attraction of cells to chemical stimuli
Hemopoiesis
The process by which the formed elements of blood are made in the body
Hemostasis
The process by which the body stops blood loss
Coagulation factors
Proteins in blood plasma which help initiate the blood clotting process
Antigen
A protein or carbohydrate that, when introduced in the blood, triggers the production of an antibody
Arteries
Blood vessels that carry blood away from the heart
Capillaries
Tiny, thin-walled blood vessels that allow the exchange of gases and nutrients between the blood and cells
Veins
Blood vessels that carry blood back to the heart
Pulmonary circulation
Circulation of the blood over the air sacs of the lungs
Systemic circulation
Circulation of the blood through the other tissues of the body
Systolic phase
The phase of the cardiac cycle in which the ventricles contract
Diastolic phase
The phase of the cardiac cycle in which the ventricles relax
Cardiac cycle
One complete round of systole and diastole
Arterioles
The smallest arteries that still have three tunics
Venules
Small veins that do not have three tunics but instead have only an endothelium, a basement membrane, and a few smooth muscle cells