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Blood

Blood. Red & White blood cells and Platelets Functions of blood Blood Clotting Functions of blood plasma Tissue fluid and lymph Lymph nodes Atherosclerosis & Coronary thrombosis. Blood . Red Blood Cells. White Blood Cells. These play a role in immunity. Phagocytosis by WBC. Monocyte.

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Blood

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  1. Blood Red & White blood cells and Platelets Functions of blood Blood Clotting Functions of blood plasma Tissue fluid and lymph Lymph nodes Atherosclerosis & Coronary thrombosis

  2. Blood

  3. Red Blood Cells

  4. White Blood Cells These play a role in immunity

  5. Phagocytosis by WBC Monocyte Lymphocyte

  6. Platelets • These are small cell fragments that assist in blood clotting. Normal Platelets in Flowing blood

  7. Functions of Blood • Transports Oxygen • Transports Carbon Dioxide • Transport of other solutes eg. Food Substances, Urea, Hormones • Distribution of Heat • Defence against disease • Blood Clotting

  8. Blood Clotting

  9. Another look at a blood clot

  10. Blood plasma • Contains : • Water • Nutrients • Proteins (albumin and globulin) • Gases • Hormones • Waste • Plasma is a watery liquid • Transports substance from where they are made or enter the body to their destination.

  11. Tissue Fluid and Lymph • The lymphatic system is a system of thin tubes that runs throughout the body. • The lymphatic system carries a colourless liquid called 'lymph‘ ,that circulates around the body tissues. • It contains a high number of lymphocytes (WBC) and plasma that leaks out of the capillaries (Tissue fluid). • This then drains into the lymph vessels.

  12. Lymph nodes

  13. There are lymph nodes • Under your arms, in your armpits                 • In each groin (at the top of your legs)                 • In your neck There are also lymph nodes that you cannot feel • Your abdomen                           • Your pelvis           • Your chest  Other organs that are part of the lymphatic system • The lymphatic system includes other body organs.  These are theSpleen         • Thymus         • Tonsils         • Adenoids

  14. Location of some lymph organs

  15. Atherosclerosis • Atherosclerosis is the name given to the build up of cholesterol and fat (fatty deposits or plaques) in the artery walls. • The arteries become narrow and hardened, their elasticity disappears and it becomes difficult for blood to flow through. • The fatty plaques can also rupture, causing blood to clot around the rupture. • If blood can't then flow past the clot to the necessary part of the body, the tissue dies. • Plaque ruptures are a common cause of heart attacks. • Most people in the developed world have atherosclerosis in some parts of their body, without ever noticing it. • Atherosclerosis develops gradually over time and can start around the age of 20.

  16. Coronary Thrombosis • The heart is surrounded by three major coronary arteries that supply it with blood and oxygen. • If a blood clot develops in one of these arteries, the blood supply to that area of the heart muscle will stop. This is known as a heart attack, or in medical terms a coronary thrombosis or myocardial infarction. • A heart attack will cause severe chest pains behind the breast bone, often radiating towards the left arm. • If the blockage (thrombosis) is not dissolved quickly with medication, the area of heart muscle that isn't getting enough oxygen will stop working properly. • The person may die

  17. Summary • Blood consists of different parts • RBC, WBC and Platelets have different roles • Lymph and Tissue fluid has an important role • Atherosclerosis is the damaging of arteries which and lead to coronary thrombosis or heart attack

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