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प्रश्न
Write names of different parts of human digestive system and explain functions of any three parts.
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उत्तर
(1) The digestive system of human beings consists of an alimentary canal and the associated digestive glands.
Alimentary canal: The human alimentary canal begins with the mouth and ends in the anus. It is a long muscular tube of varying diameter consisting of oesophagus, stomach, small intestine and large intestine. Associated digestive glands: The digestive glands associated with the alimentary canal are salivary glands and gastric glands.
(1) Mouth: In the mouth, there are teeth which masticate the food and convert the larger particles of food into smaller ones. The tongue helps in tasting the food and rolling it into a soft ball. There are salivary glands in the mouth which secrete saliva.
(2) Oesophagus: The oesophagus is a narrow tube carrying food to the stomach. Due to peristalsis, the food is pushed forward in the alimentary canal.
(3) Stomach: The stomach is a J-shaped muscular organ situated on the left side of the abdomen. Muscles of the stomach also undergo peristalsis and push the food forward. In the stomach, the food is mixed thoroughly with the gastric juice secreted by the gastric glands present in the stomach wall. There is a sphincter muscle at the lower end of the stomach. This sphincter muscle releases the partially digested food into the small intestine.
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संबंधित प्रश्न
Which part of the digestive canal is involved in:
Complete digestion of food ______.
Which of the organs perform the following function in humans?
Absorption of water
What is the name of tiny projections on the inner surface of small intestine which help in absorbing the digested food?
Which of the following component of our food is digested by an enzyme which is present in saliva as well as in pancreatic juice?
List in tabular form two differences between pepsin and trypsin.
Define the following term:
Peristalsis
Give any four reasons why water is necessary in our body.
Give Scientific reasons:
Consuming iodized salt in day to day diet is essential.
Write the function of the following in the human alimentary canal:
HCl in stomach
Name the organ where the juice bile is temporarily stored.
Fill in the blanks.
Removal of undigested food is called ________.
Write true or false for the below statement. Rewrite the false statements correctly.
The wave-like motion of stomach muscles to push the food is called peristalsis.
Differentiate between
Small intestine and Large intestine
State whether the following statements are True or false: Pancreatic amylase digests protein into amino acids.
Name the enzymes secreted by the following: Salivary glands
Who is telling a lie?
Liver: I am the largest gland in the body.
The other name of food pipe is alimentary canal.
(i)______ and (ii)______ form the common bile duct.
Fill in the blanks using the words listed below.
| water, front, intestinal, salts, pseudopodia, back, vacuole |
- The digestion of all food components is completed by the ______ juice.
- Large intestine absorbs ______ and some ______ from the undigested food.
- Tongue is attached at the ______ to the floor of the mouth cavity and is free at the ______.
- Amoeba pushes out ______ around the food and traps it in a food ______.
