Our body

Our body is important because it is unique, the only one of its kind. Our body can move and has five senses: hearing, seeing, touching, tasting and smelling. There is a special part in our body that lets us think and have feelings. This is the brain. We look after our body by eating healthy food, exercising, resting and keeping it clean.

The major systems of the body are the skeletal - (gives the body its shape), central nervous (controls body function and movement), respiratory (breathing), circulatory - (moves blood around the body) and digestive (eats and absorbs food and water and excretes waste products). The food we eat, the water we drink, the air we breathe, drugs and any other substances, travel through the body using combinations of the respiratory, digestive and circulatory systems. The circulatory system is the one that links these systems to the brain and the central nervous system.

Like everything else in our bodies, breathing is controlled and monitored by our brains. Breathing supplies oxygen to our lungs and through the system to all of our cells. Each and every cell in our body needs oxygen to work properly to keep us alive. The parts of the respiratory system are: nose, pharynx, trachea, bronchi, bronchioles and air passages, alveoli and lungs. The circulatory system is made up of blood, the heart, arteries, veins and capillaries. The heart pumps blood around the body in strong spurts (heartbeats). Blood is pumped through the vessels (arteries, veins and capillaries) by the heart. The role of the circulatory system is to deliver and remove all of the required nutrients and wastes our body needs or expels. Whatever we put into our bodies, either by eating or inhaling, will enter our circulatory system to be delivered around the body. The digestive system is also known as the alimentary canal. The whole canal is over eight metres long! The system processes our food, and breaks it into vitamins, minerals and other elements which then go as nutrients to supply all of our body.

The digestive system is made up of many different parts though all are connected from one end through to the other end.

Mouth - This is the entrance to the digestive system, and as soon as we even think of some foods, our system begins to work by excreting saliva. Our mouth waters. Saliva moistens food to make it easier to process, and it also begins digestion by adding enzymes to break the food down. The central nervous system is our body’s control centre. The system is made up of your brain, nerves and the pathways they follow through your body.

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