Ch. 7.8 Circulatory System
What is the aortic valve?
The aortic valve is located between the left ventricle and the aorta, it closes when the left ventricle is finished contracting allowing blood to flow into the aorta and preventing blood from flowing back into the left ventricle.
What is the circulatory system?
The circulatory system consists of the heart, blood vessels, and blood, transports nutrients and wastes, oxygen and carbon dioxide, hormones, and antibodies (cardiovascular system).
What is the 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?
Plasma is approximately 90 percent water with many dissolved, or suspended substances.
What is the systole?
The systole is a period of ventricular contraction.
What are arrhythmias?
Arrhythmias are abnormal heart rhythms.
What is diastole?
Diastole is a brief period of rest.
What are leukocytes?
Leukocytes are white blood cells.
What is the pulmonary valve?
The pulmonary valve is located between the right ventricle and the pulmonary artery, closes when the right ventricle has finished contracting.
What are thrombocytes?
Thrombocytes are usually described as fragments or pieces of cells because they lack nuclei and vary in shape and size.
What are arteries?
Arteries carry blood away from the heart.
What is the 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?
What is the mitral valve?
The mitral valve is located between the left atrium and the left ventricle, closes when the left ventricle is contracting allowing blood to flow into the aorta.
What is the right atrium?
The right atrium receives blood as it returns from the body cells.
What is the tricuspid valve?
The tricuspid valve is located between the right atrium and the right ventricle, 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 blood?
Blood transports oxygen from the lungs to the body cells, carbon dioxide from the body cells to the lungs, nutrients from the digestive tract to the body cells, metabolic and waste products from the body cells to the organs of excretion, heat produced by various body parts, and hormones produced by endocrine glands to the body organs.
What is hemoglobin?
Hemoglobin is a complex protein composed of the protein molecules globin and the iron compound called heme.
What is the myocardium?
The myocardium is the muscular middle layer.
What is the 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 are veins?
Veins are blood vessels that carry blood back to the heart.
What are capillaries?
Capillaries connect arterioles with venules and are located in close proximity to almost every cell in the body.
What is the left atrium?
The left atrium receives oxygenated blood from the lungs.
What is the pericardium?
The pericardium is a double-layered membrane or sac that covers the outside of the heart.
What is the septum?
The septum is a muscular wall that separates the heart into a left and right side.
What are erythrocytes?
Erythrocytes are red blood cells.