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Monday, 22 October 2018
Tuesday, 16 October 2018
Thursday, 4 October 2018
RESPIRATORY SYSTEM
THE
RESPIRATORY SYSTEM
It
absorbs oxygen into the body and releases carbon dioxide. The lungs
and the trachea are organs of the respiratory system.
There
are two processes involved in respiration: pulmonary ventilation and
gas exchange.
- PULMONARY VENTILATION is the movement of air into and out of the lungs. This process is performed by two movements inspiration and expiration.
- GAS EXCHANGE take place in the alveoli.During this porcess, oxygen from the outside air passes into your blood and carbon dioxide which is in the blood passes to your lungs and leaves your body.
Now, it is time to have a look how respiration is performed.
Friday, 28 September 2018
DIGESTIVE SYSTEM
THE DIGESTIVE SYSTEM
It breaks food we eat into smaller molecules that our body can absorb. The stomach and the intestines are organs of the digestive system.
There are 3 stages in the digestive process:
- DIGESTION: it is the set of changes to food as it travels along the digestive tract. The objective is to transform food into nutrients.
- ABSORPTION: in the absorption stage the nutrients pass to the blood through capillaries which are found in the villi in the small intestine walls.
- EXCRETION: the final stage of the digestive process includes the preperation and elimination of the part of our food that our body does not need.
Let's see how food travels inside your body
Friday, 21 September 2018
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