Table of Contents
What structure contains blood with the highest oxygen concentration?
The pulmonary veins have the greatest concentration of oxygenation, because they bring oxygenated blood from the lungs to the left atrium. They are the only veins that carry oxygenated blood. Blood in the pulmonary arteries is deoxygenated and travels from the right ventricle to the lungs for gas exchange.
What microscopic vessel enables nutrients and oxygen to pass into surrounding tissues?
Deoxygenated blood that flows into your veins is collected within tiny blood vessels called capillaries. Capillaries are the smallest blood vessels in your body. Oxygen passes through the walls of your capillaries to your tissues.
What abbreviation refers to a narrowing of the aorta?
Coarctation of the aorta (COA) is a narrowing of the aorta, the major blood vessel that carries blood away from the heart to the body. This narrowing causes the left side of the heart to work harder to pump blood through the aorta.
Which classification of drugs relaxes the smooth muscle in arterial walls to decrease blood pressure?
Vasodilators act by relaxing smooth muscle in the walls of blood vessels, allowing small arteries to dilate and thereby decreasing total peripheral resistance.
What is the membranous sac that surrounds the outside of the heart?
A double-layered membrane called the pericardium surrounds your heart like a sac. The outer layer of the pericardium surrounds the roots of your heart’s major blood vessels and is attached by ligaments to your spinal column, diaphragm, and other parts of your body.
Which type of blood vessel usually carries oxygen-poor blood?
pulmonary artery
The pulmonary artery carries oxygen-poor blood from the right ventricle into the lungs, where oxygen enters the bloodstream. The pulmonary veins bring oxygen-rich blood to the left atrium. The aorta carries oxygen-rich blood to the body from the left ventricle.
What is the meaning of COA?
Certificate Of Authenticity
A. O. (Certificate Of Authenticity) A document that accompanies software which states that it is an original package from the manufacturer.
What term means pertaining to around the heart?
Cardiovascular — Pertaining to the heart and blood and blood vessels.
What do vasodilators treat?
These drugs treat a variety of conditions, including high blood pressure. Vasodilators are medications that open (dilate) blood vessels. They affect the muscles in the walls of the arteries and veins, preventing the muscles from tightening and the walls from narrowing.
What does peripheral vasodilation mean?
Peripheral vasodilators are used in peripheral arterial disease (PAD) and intermittent claudication to try to open up (dilate) the arteries; this helps to increase the distance you can walk before pain develops. In Raynaud’s phenomenon they are used to dilate the small blood vessels and prevent them from constricting.