Ch. 7.8 Circulatory System Key Terms
largest artery in the body, located between the left ventricle and the aorta
What is the aortic valve?
the transportation system of the body, consists of the heart, blood vessels, and blood
What is the circulatory system?
receives oxygenated blood from the lungs
What is the left atrium?
a double layered membrane that covers the outside of the heart
What is the pericardium?
a muscular wall that separates the heart into right and left
What is the septum?
abnormal heart rhythms and can be mild to life threatening
What are arrythmias?
a brief period of rest
What is diastole?
receives blood from the left atrium and pumps the blood into the aorta for transport to the body cells
What is the left ventricle?
a fluid that makes up blood, 90% water
What is plasma?
a period of ventricular contraction
What is the systole?
organs that carry blood away from the heart
What are arteries?
a smooth layer of cells that lines the inside of the heart and is continuous with the inside of blood vessels
What is the endocardium?
white blood cells, there are not as much of these as erythrocytes, main function is to fight infection, usually lives from 3-9 days
located between the right ventricle and the pulmonary artery(a blood vessel that carries blood to the lungs)
What is the pulmonary valve?
also called platelets, usually described as fragments or pieces of cells because they lack nuclei and vary in shape and size
What are thrombocytes?
the one that flows through the circulatory system is often called a tissue because it has many types of cells
red blood cells, produced in red bone marrow at a rate of 1 million per minute; there are about 25 trillion erythrocytes in the body
What are erythrocytes?
located between the left atrium and left ventricle
What is the mitral valve?
receives blood as it returns from the body cells
What is the right atrium?
located between the right atrium and the right ventricle, allows blood to flow to the lungs without flowing directly to the right atrium again
What is the tricuspid valve?
connect arterioles with venules, the smallest veins
What are capillaries?
a complex protein composed of the protein globin and the iron called heme, found in red blood cells
What is hemoglobin?
the thickest layer of the heart, the muscular middle layer
What is the myocardium?
receives blood from the right atrium and pumps the blood into the pulmonary artery
What is the right ventricle?
blood vessels that carry blood back to the heart
What are veins?