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THE DIGESTIVE SYSTEM (Is a group of organs that EXTRACT NUTRIENTS from…

- - - - SALIVARY GLANDS podruce saliva it make easier to CHEW and SWALLOW
        
        TONGUE moves FOOD and form BOLUS
        
        THE BOLUS passes into the OESOPHAGUS
  - - - The walls of the OESOPHAGUS have muscles (relax and contract) that push the BOLUS of food down the oesophagus to the STOMACH
  - - - 2.stomach contract and relax, mixing the food and gastric juices to form CHYME
  - - - CHYME mixes with BILE (LIVER) and PANCREATIC JUICES (PANCREAS)
        
        The liquid breakdown the chyme INTO NUTRIENTS.
        
        NUTRIENTS ARE ABSROBED INTO THE BLOOD TROUGH THE SMALL INTESTINE
        
        WASTE passes into the LARGE INTESTINE where extra water is absorbed back into the body
        
        the rest of WASTE psses into the RECTUM and then leaves the BODY trough the ANUS
- - - - TRACHEA goes down the chest and divided into two tubes called 1BRONCHI
        
        BRONCHUS divides into smaller and smaller BRONCHI . The smallest are called Bronchioles
        
        AT the ends of BRONCHIOLES there are air sacs called ALVEOLI covered by Capillaries
- - - - THE RIBCAGE EXPANDS
- - - - RIBS CAGE CONTRACT AND GETS SMALLER
- - - - OXYGENATED BLOOD enters the LEFT ATRIUM then it goes to the LEFT VENTRICLE AND then it goes to the rest of the body through the AORTA
        
        From the AORTA the blood goes to the ARTERIES AND CAPILLARIES . IN CAPILLARIES GAS EXCHANGE OCCURS (release O2 and takes CO2)
        
        DEOXYGENATED BLOOD flows into SMALL veins and then into LARGER ones.
        THE LASRGEST VEIN are SUPERIOR VENA CAVA and THE INFERIOR VENA CAVA.
        THEY CARRIED DEOXYGENATED BLOOD to the RIGHT ATRIA and the process star again
- - - - Is a yellow liquid.
        -Is 90% water.
        
        carried NUTRIENTS and WASTE products
    - - Carry OXIGEN AND CARBON DIOXIDE
        
        GIVE BLOOD its RED COLOUR
    - - FIGHT INFECTIONS
    - - particles that joint togheter when there is a cut
  - - - Carries oxygenated blood from the heart to capillaries in the rest of the body
    - - TINY BLOOD VESSELS WITH THIN WALLS . GASES and SUBSTANCES can pass trough them
    - - Carry deoxygenated Blood from capillaries to the heart
- - - - RENAL ARTERIES carry blood to the KIDNEYS where WASTE products are removed
        
        WASTE PRODUCTS mix with WATER to make URINE.
        
        URINE travels down The URETERS to the BLADDER
        
        When the BLADDER IS FULL sends signals to the brain. ( Go to the toilet and URINE)
        
        URINE leaves the body trough the URETHRA
  - - - Layer of skin
        
        EPIDERMIS
        
        is the outer layer of the skin
        
        DERMIS
        
        Is the layer BELOW EPIDERMIS
        
        SWEAT GLANDS are produced in the DERMIS
        
        SWEAT leaves the body through tiny holes in the EPIDERMIS called PORES