Advertisements
Advertisements
प्रश्न
Write names of different parts of human digestive system and explain functions of any three parts.
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Carbohydrates are bodybuilding nutrients.
What is the name of tiny projections on the inner surface of small intestine which help in absorbing the digested food?
Which part of the body secretes bile? Where is bile stored? What is the function of bile?
The partially digested food coming from the stomach of a person enters a long and narrow organ A in his body. The organ A receives the secretion of two glands : liver and pancreas. Liver secretes a greenish-yellow liquid B which is normally stored in the organ C. Pancreas secretes pancreatic juice which contains three digestive enzymes D, E and F. The intestinal juice completes the process of digestion of food. The inner wall of organ A has millions of tiny finger-like projections G which help in the rapid absorption of digested food into blood stream. The undigested part of food then passes into wider tube H which absorbs most of the water from undigested food. The last part of tube H called I stores this undigested food (or waste) for some time. The undigested food is then passed out though opening J as faeces in the process known as K.
(a) Name the organ A.
(b) Name (i) liquid B, and (ii) organ C.
(c) What are the digestive enzymes D, E and F?
(d) Name the projections G present on the inner wall of organ A.
(e) Name (i) tube H (ii) part I (iii) opening J, and (iv) process K.
Explain the process of digestion of food in mouth, stomach and small intestine in human body.
Define the following term:
Peristalsis
Answer the following question.
Write two different ways in which glucose is oxidized to provide energy in the human body. Write the products formed in each case.
Write the function of the following in the human alimentary canal:
HCl in stomach
Write the function of the following in the human alimentary canal:
Villi
State whether the following statement is True or False.
The temporary set of teeth includes incisors, canines, and premolars only.
Name the organ where the juice bile is temporarily stored.
Define the following term:
assimilation
Fill in the blanks.
______ and ______ help in digestion but food does not pass through them.
Write short answers
What is dental plaque?
Define with examples: Herbivores
The question has four options. Choose the correct answer:
Common passage for swallowing food and breathing is
The process by which the body removes waste is called ______.
Why do we eat?
During deficiency of oxygen in tissues of human beings, pyruvic acid is converted into lactic acid in the
What are different types of cells present in the crypts of Lieberkuhn?
