Ch. 7.8 Circulatory System Key Terms
What is aortic valve
The aortic valve is located between the left ventricle and the aorta, the largest artery in the body. It closes when the left ventricle is finished contracting,
What is circulatory system
The circulatory system, also known as the cardiovascular system, is often referred to as the "transportation" system of the body. It consists of the heart, blood vessels, and blood. It transports nutrients and wastes, oxygen and carbon dioxide, hormones, and antibodies contained in the blood.
What is left atrium
The left atrium receives oxygenated blood from the lungs.
What is pericardium
The pericardium is a double-layered membrane, or sac, that covers the outside of the heart.
What is septum
A wall or partition that divides a cavity or structure
What is arrhythmias
Abnormal heart rhythms, and bed rest.
What is diastole
What is left ventricle
The left ventricle receives blood from the left atrium and pumps the blood into the aorta for transport to the body cells.
What is plasma
Blood is made of the fluid called plasma. Plasma is approximately 90 percent water, with many dissolved, or suspended, substances.
What is systole
Period of ventricular contraction in the heartbeat cycle, called systole
What is arteries
Arteries are more muscular and elastic than are the other blood vessels because they receive the blood as it is pumped from the heart.
What is endocardium
The endocardium is a smooth layer of cells that lines the inside of the heart and is continuous with the inside of blood vessels. It allows for the smooth flow of blood.
What is leukocytes
Leukocytes, or white blood cells, are not as numerous as are erythrocytes. They are formed in the bone marrow and lymph tissue and usually live about 3-9 days.
What is pulmonary valve
The pulmonary valve is located between the right ventricle and the pulmonary artery, a blood vessel that carries blood to the lungs. It closes when the right ventricle has finished contracting, preventing blood from flowing back into the right ventricle.
What is thrombocytes
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.
What is blood
Blood is a specialized body fluid composed
What is erythrocytes
The erythrocytes, or red blood cells, are produced in the red bone marrow at a rate of about one million per minute. They live approximately 120 days before being broken down by the liver and spleen.
What is mitral valve
The mitral valve 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.
What is right atrium
The right atrium receives blood as it returns from the body cells.
What is tricuspid valve
The tricuspid valve 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.
What is capillaries
Capillaries are also connected to the venous system, and one-way venous valves allow blood flow return to the heart.
What is hemoglobin
Hemoglobin, a complex protein composed of the protein molecule called globin and the iron compound called heme. Hemoglobin carries both oxygen and carbon
What is myocardium
The thickest layer is the myocardium, the muscular middle layer
What is right ventricle
The 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
They carry blood back to the heart