Biology
Answer
Importance of water in our body :
- Water is the major component of blood which carries nutrients and oxygen, to and from all the cells.
- Water is the fundamental necessity for digesting food as well as absorbing food.
- It forms the chief constituent of another major liquid in the body – saliva and mucous which bring about lubrication of the membranes which line the digestive system starting with the mouth.
- It is crucial in maintaining the body temperature.
Related Questions
The figures (A, B, C and D) shown below represent different kinds of teeth in humans. Study the figures and answer the following questions:
(a) What kind of teeth do A, B, C and D represent ?
(b) Write one structural feature/shape of each.
(c) Mention the number of teeth of each kind in one jaw with their specific position.
(d) Name two minerals present in teeth.
(e) What do you mean by 'Wisdom tooth'?
Draw a neat diagram of the "Microscopic Structure of an intestinal villus" and label the parts given below :
- Epithelium
- Capillaries
- Lacteals
Answer the following questions :
(a) What is the advantage of having a large number of villi on the inner surface of small intestine ?
(b) Write the important role of lacteals.
(c) Name the juice secreted from the glandular cells of small intestine.
(d) Name the specific secretions of:
- Salivary gland
- Stomach
- Liver
- Pancreas
Vedika observed the following structure in a biology chart showing the digestive system.
(a) Name the structure which stores bile juice.
(b) Mention the gland which secretes bile juice.
(c) What are the three enzymes found in the pancreatic juice which can act over proteins, carbohydrates and emulisifed fats ?