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प्रश्न
The question has four options. Choose the correct answer:
The hardest constituent of the tooth is
विकल्प
bone
dentine
enamel
pulp
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उत्तर
Enamel
APPEARS IN
संबंधित प्रश्न
Pancreas, Gall bladder, Glomerulus, Liver
Define holozoic nutrition.
What substances are contained in gastric juice? What are their functions?
What is meant by dental caries?
| 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. |
- Name the organ A.
- Name (i) liquid B, and (ii) organ C.
- What are the digestive enzymes D, E and F?
- Name the projections G present on the inner wall of organ A.
- Name (i) tube H (ii) part I (iii) opening J, and (iv) process K.
Study the diagram given below and then answer the question that follows:
Describe the structure of the part labelled '3'.
Write four sequential steps of the procedure of the experiment "Preparing a temporary mount of a leaf peel to show stomata".
Food are classified into three groups on the basis of the function they perform in our body. Name the three categories, and briefly give their functions. Also give their two sources each.
Write true or false for the below statement. Rewrite the false statements correctly.
The removal of faeces through the anus is called excretion.
Differentiate between
Digestion and Absorption
The question has four options. Choose the correct answer:
The vermiform appendix is a constituent of
The question has four options. Choose the correct answer:
The number of teeth that grow only once in human is
Eating fast-food ad junk food affects our health. Justify.
Describe the alimentary canal of man
Identify the part of the digestive system which is vestigial in humans?
Which option represents the CORRECT sequence of digestive organs between the mouth and the anus?
(i)______ and (ii)______ form the common bile duct.
In which part of the alimentary canal food is finally digested?
The enzymes present in the saliva convert ______.
The complete digestion and absorption of nutrients is done by the small intestine. Which of the following greatly enhances the process of absorbtion?
