Trachea - Carries air from the nose/mouth to lungs , Oxygen - Gas which diffuses in to our blood- we breath it in , Carbon dioxide - Gas which diffuses out of our blood- we breath it out, Alveoli - Air sacs where gas exchange takes place , Diaphragm - Muscle that helps us to breath , Oesophagus - Carries food from the mouth to the stomach , Stomach - Contains stomach acid and enzymes to help break down food , Small intestine - Where nutrients are reabsorbed in to the body , Large intestine - Where water is reabsorbed in to the body , Direct transmission - Kissing, touching, sexual intercourse , Indirect transmission - Water, food, sneezing , 3 types of microorganisms - Bacteria, viruses, fungi , Infection - When microorganisms invade the body and reproduce , Disease - When an infection causes damage to the body’s systems and functions , Non specific defence - White blood cells called phagocytes that absorb and digest microbes , Specific defence - Lymphocytes produce antibodies which attack microbes , Antibiotics - Used to kill bacteria and fight infections , Antifungals - Used to kill fungal infections ,
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Body Systems Lessons 6-10
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95crystalhender
KS3
Biology
Body Systems and Health
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