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revision (The Immune System (Lymphocytes---A form of small leucocyte(white…
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The Immune System
Lymphocytes---A form of small leucocyte(white blood cell)with a single round nucleus, occuring especially in the lymphatic system.
Pathogens--a bacterium, virus, or other microorganism that can cause disease.-
Phagocytes---A type of cell within the body capable of engulfing and absorbing bacteria and other small cells and particles.
White Blood Cells---White blood cells protect you from diseases. They ingest pathogens and produce antibodies.There are several types of white blood cells:Phagocytes,Lymphocytes are examples.
The Circulatory System
The Heart
Valves---A device for controlling the passage of fluid or air through a pipe, duct, especially an automatic device allowing movement in one direction only.
Ventricles
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each of the two main chambers of the heart, left and right.
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Atria---The atrium is the upper chamber in which blood enters the heart. There are two atria in the human heart – the left atrium connected to the lungs, and the right atrium connected to the venous circulation. The atria receive blood, and when the heart muscle contracts they pump blood to the ventricles.
The Blood Vessels
Arteries--any of the muscular-walled tubes forming part of the circulation system by which blood is conveyed from the heart to all parts of the body.-
Venis--any of the tubes forming part of the blood circulation system of the body, carrying in most cases oxygen-depleted blood towards the heart.-
Capillaries---Any of the fine branching blood vessels that form a network between the arterioles and venules.
Blood
White Blood Cells---White blood cells protect you from diseases. They ingest pathogens and produce antibodies.There are several types of white blood cells:Phagocytes,Lymphocytes are examples.
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Plasma---Plasma carries dissolved nutrients hormones,urea,glucose and salts are dissolved in the plasma.
Red Blood Cells---Red Blood Cells transport the oxygen required for aerobic respiration in body cells .Carry oxygen and carbon dioxide.Haemoglobin blinds to the oxygen.They are flexible to squeeze down capillaries.
The Skeletal System
Muscles---a band or bundle of fibrous tissue in a human or animal body that has the ability to contract, producing movement in or maintaining the position of parts of the body.
Bones---any of the pieces of hard whitish tissue making up the skeleton in humans and other vertebrates.
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