Soc 16-The Structure Of The Blood Vessels Flashcards
Arteries
Take blood away from the heart
Arteries main characteristics:
-thick walls and are more elastic than veins as they carry blood which is at a higher pressure than veins so they carry oxygenated blood
-the lumen can widen to allow more blood through so that when you exercise,it can reach the working muscles.
-the pulmonary artery is different as it carries deoxygenated blood from the heart to the lungs
Veins
Carries blood into the heart
Veins main characteristics
-veins have much thinner walls,are less elastic wnd carry blood at a lower pressure
-veins contain many valves which helps deoxygenated blood flow into the heart
-the pulmonary vein is different as it carries oxygenated from the lungs back to heart
Capillaries
Microscopic vessels-just one cell thick
Capillaries main characteristics:
-At the end capillaries carry oxygenated blood which transfers oxygen and nutrients to the muscles
-At the other end they carry deoxygenated blood into the veins picking up waste products and taking them around the body to dispose of them
-capillaries are where gaseous exchange takes place
What is the order of blood?
-superior vena cava
-semilunar valves
-right atrium
-inferior vena cava
-triospid valve
-right ventricle
-pulmonary artery
-pulmonary veins
-left atrium
-bicospid vslve
-left ventricle
-aorta
Plasma
The fluid part of the blood
Immune system
The structures and processes in your body that stop disease
Erythocryte
Red blood cell
Antibody
Chemical that destroys a pathogen
Pathogen
An agent that causes disease,such as a virus.
Leukocyte
White blood cell
Thrombokinase
Substance involved in blood clotting
Serotonin
Hormone that triggers the clotting process
