Level 3 Beauty Therapy - Circulatory System Questions And Answers Graded A+

The circulatory system consists of - blood heart arteries veins Blood is - a connective tissue made up of plasma and cells 90% of plasma is - water percentage of plasma in blood - 55% percentage of cells in blood - 45% PH Value of blood is - 7.4 (alkaline) What is the life span of erythrocytes - 120 days Leucocytes - produce white blood cells to fight infection Function of the blood - regulates body temperature prevents loss of fluid transports oxygen, nutrients, hormones and enzymes Red blood cells - transport oxygen around the bodyPulmonary circulation - deoxygenated blood away from the heart to the lungs Systemic circulation - oxygenated blood away from heart to the body Arteries - are vessels which carry oxygenated blood away from the heart Veins - are vessels which carry deoxygenated blood back to the heart Venules are - small veins which carry deoxygenated blood from the cappillaries to the larger veins Arterioles - relax and increase blood supply The smallest blood vessel is - the capillaries What do capillaries distribute - oxygen and nutrients Characteristics of the veins - Carry deoxygenated blood back to the heart Lumen is large Have valves Pumped by skeletal muscle Thin walls, non muscular, not elastic Characteristic of arteries - Carry oxygenated blood from the heart Lumen is small Pumped by heart & muscle tissue Thick, muscular, elastic Hep A is caused by - feacially contaminated foodHep B & Hep C are caused by - infectious bodily fluids From what chamber of the heart does the aorta exit? - Left ventricle