Ch. 7.8 Circulatory System Key Terms
is located between the left ventricle and the aorta, the largest artery in the body
aortic valve
is often called a tissue because it contains many kinds of cells.
circulatory system
receives oxygenated blood from the lungs.
left atrium
is a double-layered membrane, or sac, that covers the outside of the heart.
Pericardium
is a muscular wall that separates the heart into a right side and a left side
Septum
are abnormal heart rhythms and can be mild to life threatening
Arrhythmias
The cycle consists of a brief period of rest
Diastole
pushes blood into the aorta, sending the blood to all other parts of the body
left ventricle
is approximately 90 percent water, with many dissolved, or suspended, substances.
Plasma
a period of ventricular contraction
Systole
carry blood away from the heart.
Arteries
is a smooth layer of cells that lines the inside of the heart and is continuous with the inside of blood vessels.
Endocardium
or white blood cells, are not as numerous as are erythrocytes.
Leukocytes
is located between the right ventricle and the pulmonary artery, a blood vessel that carries blood to the lungs
pulmonary valve
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
Thrombocytes
flows through the circulatory system is often called a tissue because it contains many kinds of cells
Blood
or red blood cells, are produced in the red bone marrow at a rate of about one million per minute.
Erythrocytes
is located between the left atrium and left ventricle. It closes when the left ventricle is contracting, allowing blood to flow into the aorta (for transport to the body) and preventing blood from flowing back into the left atrium.
mitral valve
receives blood as it returns from the body cells.
right atrium
is 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.
tricuspid valve
are also connected to the venous system, and one-way venous valves allow blood flow return to the heart.
Capillaries
carries both oxygen and carbon dioxide
Hemoglobin
the muscular middle layer
Myocardium
receives blood from the right atrium and pumps the blood into the pulmonary artery, which carries the blood to the lungs for oxygen.
right ventricle
are blood vessels that carry blood back to the heart
Veins