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प्रश्न
Why do we call saliva a digestive juice?
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उत्तर
Saliva is the juice secreted by the salivary glands. Saliva helps to make bolus from the food that we eat. Saliva also contains a starch digesting enzyme. This enzyme turns starch into sugar. Therefore, saliva is called a digestive juice.
संबंधित प्रश्न
The exact location of the tricuspid valve
Match the items in Column ‘A’ with those in column ‘B’ Rewrite the correct matching pairs.
| Column A | Column B | ||
| (a) | SA Node | (i) | Plasma |
| (b) | Defective haemoglobin in RBC | (ii) | Serum |
| (c) | Muscle fibres located in heart | (iii) | Pacemaker |
| (d) | The liquid squeezed out of blood during clotting | (iv) | Sickle cell anaemia |
| (e) | Never tires, keep on contracting and relaxing | (v) | Purkinje fibres |
| (f) | Cardiac cycle | (vi) | Cardiac muscle |
| (g) | Liquid part of the blood without corpuscles | (vii) | 0·85 sec |
How do you account for the following difference?
The walls of the right ventricle are thicker than those of the right auricle.
Fill in the blanks with suitable words given below:
The two lower chambers of the heart are called ______.
The oxygen-rich blood from the lungs comes into the ______ of the heart.
Fill in the blank:
______ carry pure blood.
Name the organ from which oxygenated blood goes into the heart
Why is circulatory system also known as transport system?
Given below is a schematic representation of the circulatory system in man. Study the same and answer the questions that follow:
(i) Label the parts 1 to 4 indicated in the diagram.
(ii) Give one difference between parts 1 and 2 based on:
(a) their structure
(b) the nature of blood flowing through them.
(iii) What is the specific name of the type of blood circulation that takes place between the heart and the lungs?
(iv) Name the valve found at the beginning of the part labeled 3.
______ is a granulocyte.
