Explain human digestive system science class
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Answer:
hum
an digestive system help us to eat,, digest, and produce energy . for growth and development of our body..
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Answer:
The main parts of human digestive system are called as alimentary canal:-
1.)The mouth and oesophagus
2.)The stomach
3.)The small intestine
4.)Pancreas
5.)Liver
6.)The large intestine
We need food to fuel our bodies for energy, growth and repair.
1.) The mouth and oesophagus:
Digestion begins in the mouth. The food is ground up by the teeth and moistened with saliva to make it easy to swallow. Saliva also has a special chemical, called an enzyme, which starts breaking down carbohydrates into sugars. Once swallowed, muscular contractions of the oesophagus massage the ball of food down into the stomach.
2.) The stomach:
The food passes through a sphincter, or small muscle ring, into the stomach. Here it is mixed with gastric juices. The stomach is a muscular bag and it churns the food to help break it down mechanically as well as chemically. The food is then squeezed through a second sphincter into the first part of the small intestine, called the duodenum.
3.) The small intestine:
Once in the duodenum, the food is mixed with more digestive enzymes from the pancreas and bile from the liver. Food is then squeezed into the lower parts of the small intestine, called the jejunum and the ileum. Nutrients are absorbed from the ileum, which is lined with millions of finger-like projections called villi. Each villus is connected to a mesh of capillaries. This is how nutrients pass into the bloodstream.
4.) Pancreas:
The pancreas is one of the largest glands in the human body. As well as digestive juices, it secretes a hormone called insulin. Insulin helps to regulate the amount of sugar in the blood. Diabetes is a condition caused by problems with insulin production.
5.)Liver:
The liver has a number of different roles in the body, including:
The liver has a number of different roles in the body, including:breaking down fats, using bile stored in the gall bladder
The liver has a number of different roles in the body, including:breaking down fats, using bile stored in the gall bladderprocessing proteins and carbohydrates
The liver has a number of different roles in the body, including:breaking down fats, using bile stored in the gall bladderprocessing proteins and carbohydratesfiltering and processing impurities, drugs and toxins
The liver has a number of different roles in the body, including:breaking down fats, using bile stored in the gall bladderprocessing proteins and carbohydratesfiltering and processing impurities, drugs and toxinsgeneration of glucose for short-term energy needs from other compounds like lactate and amino acids.
6.) The large intestine:
Once all the nutrients have been absorbed, the waste is moved into the large intestine, or bowel. Water is removed and the waste (faeces) is stored in the rectum. It can then be passed out of the body through the anus.
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