Ch. 7.8 Circulatory System Key Terms
What is aortic valve?
Allows blood to flow into the aorta and prevents blood from flowing back into the left ventricle.
what is arrhythmias?
Abnormal heart rhythms and can be mild to life threatening.
What is arteries?
Carry blood away from the heart.
what is blood?
Flows through the circulatory system.
what is capillaries?
the smallest veins
What is circulatory system?
Referred to as the “transportation” system of the body.
What is diastole?
The cycle consists of a brief period of rest.
what is endocardium?
A smooth layer of cells that lines the inside of the heart and is continuous with the inside of blood vessels.
What is erythrocytes?
Produced in the red bone marrow at a rate of about one million per minute.
What is hemoglobin?
A complex protein composed of the globin and heme.
What is left atrium?
Receives oxygenated blood from the lungs.
What is leukocytes?
White blood cells.
What is mitral valve?
Allows blood to flow into the aorta and prevents blood from flowing back into the left atrium.
What is myocardium?
The muscular middle layer.
What is pericardium?
A double-layered membrane, or sac, that covers the outside of the heart.
What is left ventricle?
Receives blood from the left atrium and pumps the blood into the aorta for transport to the body cells.
What is plasma?
Approximately 90 percent water.
What is pulmonary valve?
A blood vessel that carries blood to the lungs.
What is right atrium?
Receives blood as it returns from body cells.
What is right ventricle?
Receives blood from the right atrium and pumps the blood into the pulmonary artery.
What is septum?
A muscular wall that separates the heart into a right side and a left side.
What is systole?
A period of ventricular contraction.
What is thrombocytes?
Fragments or pieces of cells because they lack nuclei and vary in shape and size.
What is tricuspid valve?
Allows blood to flow to the lungs and prevents blood from flowing back into the right atrium.
What is veins?
Blood vessels that carry blood back to the heart.