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HUMAN BODY

HUMAN BODY. The Intestines. Small intestine, 5-6 meters long. Large intestine, 1.5 meters long. An adult’s small intestine is 6-7 meters long. The large intestine is 7 to 10 cm wide. The large intestine absorbs the water from the waste.

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HUMAN BODY

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  1. HUMAN BODY The Intestines

  2. Small intestine, 5-6 meters long. • Large intestine, 1.5 meters long. • An adult’s small intestine is 6-7 meters long. • The large intestine is 7 to 10 cm wide. • The large intestine absorbs the water from the waste. • The small intestine has three layers called, serosa, muscle layer and the mucosa layer. • The small intestine folds, twists in the center of the cecum, below the stomach. • The small intestine is divided into three pieces, they are the duodenum, ileum and the jejunum. • The large intestine is divided into 6 pieces, they are cecum, ascending colon, transverse colon, descending colon, sigmoid colon and the rectum.

  3. Esophagus is 25 centimetres long. • The food stays in the mouth for about 1 minute. • In the stomach the food stays there for 2-4 hours. • The food stays in the small intestine from 1-4 hours. • The food stays at the colon for 10 hours or for a several days. • 1.9 litres of food and liquid passes through your body in one day. • We eat about 500 kg of food in a year. • 1.7 liters of saliva is made in your mouth in one day. • Adults can hold 1.5 liters of food in their stomach. • In your life time the digestive system can handle 50 tons of food and liquid. • To make saliva, we need salivary glands.

  4. Saliva helps our food to break down into pieces. • In the saliva there are chemicals called enzymes. • The digestive system functions to move food through the system. All of the digestive organs contain a lining made of smooth muscle tissue. These muscles contract in waves, a process known as peristalsis, which propel food downward. Due to this, food moves down the esophagus to the stomach, even if the person is standing on her head. • In the stomach, there is a acid called hydrochloric acid which breaks down food. • An adult's stomach can hold approximately 1 litre of food. The stomach is a sac-like structure surrounded by a muscular wall that provides elasticity. The stomach can expand to hold four times its normal volume.

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