Ch. 7.8 Circulatory System Key Terms
what is aortic valve
is located between the left ventricle and the aorta
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
is a double- layered membrane, or sac that covers the outside of the heart.
what is septum
is a muscular wall that separates the heart into a right side and left side
what is . Arrhythmias
are abnormal heart rhythms and can be mild to life threatening.
what is diastole
at the start of the cycle, the atria contract and push blood into the ventricles
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
is approximately 90 percent water, with many dissolved or suspended substances.
what is systole
at the start of the cycle, the atria contract and push blood into the ventricles
what is Arteries
carry blood away from the heart.
what is Endocardium
is a smooth layer of cells that lines the inside of the heart and is continuous with inside of the heart
what is Leukocytes
or white blood cells, are not as numerous as the erythrocytes.
what is pulmonary valve
is located between the right ventricle has finished contracting preventing blood from flowing back into right ventricle
what is Thrombocytes
also called platelets, are usually described as fragments or pieces of cells because they lack nuclei
what is Blood
that 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
is located between the left atrium and left ventricle.
what is atrium
receives blood as it returns from the body cells.
what is tricuspid valve
is 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 globin and the iron compound called heme/ hemoglobin
what is Myocardium
the muscular middle or sac, that covers the outside of the heart.
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
are blood vessels that carry blood back to the heart.