a) Red & White blood cells and Platelets b) Functions of blood c) Blood Clotting d) Functions of blood plasma e) Tissue fluid and lymph f) Lymph nodes g) Atherosclerosis & Coronary thrombosis

These play a role in immunity

Monocyte Lymphocyte

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

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

 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.

 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.

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 the Spleen  Thymus  Tonsils  Adenoids

 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.

 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

 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