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Learn some more terms denoting digestive system elements
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Alimentary canal (the digestive tract) — the series of muscular structures through which food passes while being converted to nutrients and waste products; includes the oral cavity, pharynx, esophagus, stomach, large intestine, and small intestine.
Pancreas — an enzyme-producing gland located below the stomach and above the intestines. Enzymes from it help in the digestion of carbohydrates, fats and proteins in the small intestine.
Liver — a large organ located above and in front of the stomach. It filters toxins from the blood, and makes bile (which breaks down fats) and some blood proteins.
Peristalsis — rhythmic muscle movements that force food in the esophagus from the throat into the stomach. Peristalsis is involuntary — you cannot control it.
Gall bladder — a small, sac-like organ located by the duodenum. It stores and releases bile (a digestive chemical which is produced in the liver) into the small intestine.
Read and memorize some interesting facts.
→ The movement of food in the intestines of a healthy person may last from 12 to 72 hours.
→ The amount of gastric juice secreted in the stomach within 24 hours is 1.5—2 litres.
→ 1.7 liters of saliva is made in your mouth for one day.
→ The human stomach contains about 35 million small digestive glands.
Match the terms and their definitions.
| 1) Gastric juice 2) Esophagus 3) Large intestine 4) Enzyme 5) Small intestine | a) protein that speed up the rate of chemical reactions b) the long, thin winding tube that food goes through after it leaves the stomach c) muscular tube connecting the mouth and stomach d) the long, wide tube that food goes through after it goes through the small intestine e) secretion of the gastric glands of the stomach, containing hydrochloric acid, pepsin, and mucus |
II. Reading
Date: 2015-09-18; view: 534; Нарушение авторских прав