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DIGESTION - Coggle Diagram
DIGESTION
How does our digestive system keep us alive?
for the growth and repair of our body; and
to keep us healthy.
Food is important to us. We need food:
Food contains nutrients, water and dietary fibre. Some examples of these nutrients are carbohydrates, proteins and fats.
to provide us with energy to carry out daily activities;
How Does Food Enter the Blood?
However, the food that we eat is too large to enter the cells.
For our cells to be able to use the nutrients in food, it must be broken down into smaller substances.
Every cell in our body requires nutrients. We eat food that contains carbohydrates, proteins and fats to obtain these nutrients.
The process of breaking up food into smaller substances is called digestion.
What Happens After Food Enters the Blood?
Blood carries the digested food to all parts of the body to be used by the cells. You will learn more about how digested food is carried in the blood in Topic 11: Blood Circulation, and how cells use these nutrients in Topic 10: Breathing.
The digested food can enter the blood.
main organs
mouth, gullet, stomach, small intestine, large intestine, rectum, anus, salivary glands, pancreas, liver and gall bladder
explain why constipation occurs and state possible preventive measures • state the
effects of excessive alcohol consumption on the liver
show an understanding that enzymes speed up the rate of digestion and require an optimum temperature and pH to work efficiently
interpret data on the effect of pH and temperature on the rate of digestion by enzymes
associated organs of the digestive system
state how diet and level of physical activity can affect the risk of developing diabetes • demonstrate ways to avoid alcohol abuse and to discourage others from alcohol abuse • show care and concern for personal health by adopting an active lifestyle and eating a balanced diet to reduce the risk of developing diabetes
appreciate science for its usefulness in improving quality of life: knowledge of our digestive system helps us make informed decisions about our health
What Happens to Food in the Stomach?
The stomach connects the gullet to the small intestine
Stomach
• Mashes food into a liquid mixture
• Produces digestive juice that contains acid, which kills the bacteria in the food, and enzymes, which speed up the digestion of proteins
• Holds food for a few hours
The stomach is a muscular sac
How Do the Liver and Gall Bladder Help Digestion?
• After spending a few hours in the stomach, food is then released little by little into the small intestine.
• When food enters the small intestine, bile is released from the gall bladder. • Bile is produced by the liver and stored in the gall bladder.