AS Applied Science AQA Unit 2 Biology Key Terms 2023

AS Applied Science AQA Unit 2 Biology Key Terms 2023 Endothelium - Correct Answer Innermost lining of blood vessels. Elastic Tissue - Correct Answer Connective tissue made from elastic fibers that allows stretching (found in the lungs, artery walls, vocal cords) Smooth Muscle - Correct Answer a muscle that contracts without conscious control and found in walls of internal organs such as stomach and intestine and bladder and blood vessels (excluding the heart) Lumen - Correct Answer space within a tubular part or organ, such as the space within a blood vessel Double Circulatory System - Correct Answer When there are two circuits from the heart, it is described as a double circulatory system. The blood passes through the heart twice for a full circulation through the body. Pulmonary Circulation - Correct Answer circulation of blood from the pulmonary artery through the vessels in the lungs and back to the heart via the pulmonary vein, providing for the exchange of gases Systemic Circulation - Correct Answer circulation of blood throughout the body through arteries, arterioles, capillaries, and veins to deliver oxygen and nutrients to body tissues Deoxygenated - Correct Answer containing a higher concentration of carbon dioxide than oxygen Oxygenated - Correct Answer Term for blood with a high oxygen level. Atrium - Correct Answer upper chamber of the heart that receives and holds blood that is about to enter the ventricle Ventricle - Correct Answer a chamber of the heart that receives blood from an atrium and pumps it to the arteries