Ch. 7.8 Key Terms
what is aortic valve?
located between the left ventricle and the aorta, the largest artery in the body
what is circulatory system?
also known as the cardiovascular system, is often referred to as the “transportation” system of the body.
what is left atrium?
receives oxygenated blood from the lungs
what is Pericardium?
a double-layered membrane, or sac, that covers the outside of the heart
what is Septum?
a muscular wall that separates the heart into a right side and a left side
what is Arrhythmias?
abnormal heart rhythms and can be mild to life threatening
what is Diastole?
the cycle consists of a brief period of rest
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, with many dissolved, or suspended, substances
what is Systole?
the diastole followed by a period of ventricular contraction
what is Arteries?
carry blood away from the heart
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 Leukocytes?
or white blood cells, are not as numerous as are erythrocytes
what is pulmonary valve?
located between the right ventricle and the pulmonary artery, a blood vessel that carries blood to the lungs
what is Thrombocytes?
also called platelets, are usually described as fragments or pieces of cells because they lack nuclei and vary in shape and size
what is Blood?
flows through the circulatory system is often called a tissue because it contains many kinds of cells
what is Erythrocytes?
or red blood cells, are produced in the red bone marrow at a rate of about one million per minute
what is mitral valve?
located between the left atrium and left ventricle
what is right atrium?
receives blood as it returns from the body cells
what is tricuspid valve?
located between the right atrium and the right ventricle
what is Capillaries?
connect arterioles with venules, the smallest veins
what is Hemoglobin?
a complex protein composed of the protein molecule called goblin and the iron compound called heme.
what is Myocardium?
the thickest layer, the muscular middle layer
what is right ventricle?
receives blood from the right atrium and pumps the blood into the pulmonary artery, which carries the blood to the lungs for oxygen
what is Veins?
blood vessels that carry blood back to the heart