Online Shiksha

By Savita S. More

Maharashtra Board Class 7 Science The Muscular System and Digestive System in Human Beings

 

Fill in the blanks with the right word from the brackets.

The process of digestion starts from the mouth.

Eyelids have involuntary muscles.

Production of blood cells is not a function of the muscular system.

Muscles of the heart are cardiac muscles.

Pushing forward the food that has been chewed is the function of the oesophagus.

 

Group ‘A’ and Group ‘B’:

(1) Cardiac – (a) always function in pairs.
(2) Are brought about by muscles – (c) uncontrolled and painful contraction of muscles.
(3) Pepsin – (e) enzyme of the gastric juice.
(4) Cramps – (b) we never feel tired.
(5) Skeletal – (d) chewing movements of jaws.

 

Who is telling a lie? –  Organ Statement

Tongue My taste-buds can tell only a sweet taste.

Liver I am the largest gland in the body.

Large intestine I am 7.5 meter long.

Appendix Digestion is impossible without me.

Lung I play an important role in excretion.

 

The statement that is false is: Tongue: “My taste-buds can tell only a sweet taste.”

 

Give reasons.

 

(1) Food becomes acidic in the stomach:

Gastric glands produce hydrochloric acid (HCl) and other digestive enzymes in the stomach, causing food to become acidic. To digest and absorb food, the stomach needs an acidic environment to activate digestive enzymes and break down protein.

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