Human Nutrition

• Process of taking in food, drink or other substances

• Breakdown of large food molecules into smaller soluble substances

• Movement of digested food molecules from the wall of intestines into the blood or lymph

• Movement of digestion food molecules to the cells in the body where they are used

• Removal of faeces

• Chewing

• Salivary amylaze breaking down starch into maltose

• Prevent chime entering the oesophagus

• Allow chime into the duodenum

• Mucous

• physical digestion

• Pepsinogen

• When in contact with acid

• Pepsin

• Rennin

• Controls blood sugar levels

• Islets of Langerhans

• In the duodenum

• Emulsifies (breaks down) fats
• Neutralises chyme (vomit) / brings chyme to pH 7

• Liver

• Gall Bladder

• Bile duct

• Brings deoxidfied blood from liver to the vena cava

• Supplies liver with oxygen-rich blood

• Carries blood with nutrients from the ileum to the liver

• Iron and haemoglobin

• Catalase

• Deamination

• Allow substances to travel from small intestine into blood

A

• Absorbs glucose and amino acids

• Absorb Lipids

• Human and Bacteria

• Provides bulk
• Absorbs water which prevents constipation
• Prevents overeating
• Linked with prevention of bowel cancer