Human Body

• Specialised cells carry out specific functions in our bodies
• Groups of similar cells make tissues
• Groups of tissues form organs
• Groups of organs make up our body

• Groups of organs working together to do a particular job in the body is called a body system
• e.g. digestive system and nervus system

Mouth-Oesophagus-Stomach-Small Intestine-Large Intestine-Rectum-Anus

When food is broken down into smaller substances which are absorbed into the blood. It then removes the waste that was not digested

Breaks down starch into sugar in the mouth and small intestine

Breaks down proteins into amino acids in the stomach and small intestine

Breaks down fats and oils into fatty acids and glycerol in the small intestines

Digestion begins with teeth cutting and grinding food into smaller pieces

Moves food down to stomach and is 25cm long

J-shaped organ that churns the food mixed with gastric juices and is turned into chyme. Can hold up to 2L and is lined with mucus to protect from acids

Largest internal organ and is about 1.5kg producing chemicals for over 500 processes

It is the start of the small intsetines and where the pancrease, liver and bladder join the digestive track

A 3-4cm wide and 4-6m long tube where waters and minerals are absorbed

Lumps of faecus are stored and get expelled by the anus

A ring like muscle contracts and relaxes and opens when faecus are being expelled

• System of bones that: protects vital organs
• Supports the body
• Allow movement with joints

Protects the brain with a solid casing which also houses most of the sense organs

Protects the lungs and heart in a cage and the ribs move to allow breathing

Column of seperate bones called the vertebrae that support the body and protect the nerves of the spinal chord which run through the spinal chord

Form a strong base for the backbone and internal organs

The long bones of the arms and legs that have many joints and allow plenty of movement

Special chemicals that speed up chemical reactions. Each has its own special shape and fits with one type of substance