CH. 07.8 KEY TERMS
is located between the left ventricle and the aorta, the largest artery in the body
circulatory system
referred to as the transportation system of the body
left atrium
receives oxygenated blood from the lungs
pericardium
a double-layered membrane, or sac, that covers the outside of the heart
septum
a muscular wall that separates the heart into a right side and a left side
arrhythmias
are abnormal heart rhythms and can be mild to life-threatening
distole
The cycle consists of a brief period of rest
left ventricle
pushes blood into the aorta, sending the blood to all other parts of the body
plasma
approximately 90 percent water, with many dissolved or suspended substances.
systole
a period of ventricular contraction
arteries
carry blood away from the heart
endocardium
a smooth layer of cells, is produced in the red bone marrow at a rate of about one million per minute
leukocytes
or white blood cells- are not as numerous as are erythrocytes
pulmonary valve
located between the right ventricle and pulmonary artery, a blood vessel that carries blood to the lungs.
thrombocytes
also called platelets- are usually described as fragments or pieces of cells because they lack nuclei and vary in shape and size. They are formed in the bone marrow and live for about 5-9 days
blood
flows through the circulatory system, and is often called a tissue because it contains many kinds of cells
erythrocytes
or red blood cells- are produced in the red bone marrow at a rate of about one million per minute
mitral valve
located between the left atrium and left ventricle. It closes when the left ventricle contracts, allowing blood to flow into the aorta (for transport to the body) and preventing blood from flowing back into the left atrium.
right atrium
receives blood as it returns from the body cells
tricuspid valve
located between the right atrium and the right ventricle. It closes when the right ventricle contracts, allowing blood to flow to the lungs and preventing blood from flowing back into the right atrium.
capillaries
connect the arterioles with venules, the smallest vein
hemoglobin
carries both oxygen and carbon dioxide
myocardium
the muscular middle layer
right ventricle
receives blood from the right atrium and pumps the blood into the pulmonary artery, which carries the blood to the lungs for oxygenation.
veins
blood vessels that carry blood back to the heart