1. the process of digestion start from the mouth .
2. eyelids have involuntary muscles .
3. production of blood cell is not function the muscular system .
4. muscles of the heart are cardiac muscles .
5. pushing forward the food that has been chewed is the function of the oesophagus .
2. MATCH THE FOLLOWING :
1. cardiac muscles -we never feel tried.
2. are brought about my muscles -chewing movement of jaws.
3.pepsin- enzyme of gastric juice.
4. cramps- uncontrolled and painful contraction of muscles.
5. skeletal muscles-always function in pairs.
3. WHO IS TELLING A LIE?
1. tongue : my taste buds can tell only a sweet taste.
Ans: tongue is telling lie.
2. liver : i am the largest gland in the body.
Ans: liver is not telling lie.
3. large intestine : i am 7.5 meter long.
Ans: large intestine is telling lie.
4. appendix : digestion is impossible without me.
Ans: appendix is telling lie.
5. lung : i play an important role in excretion.
Ans: lung is telling lie.
4. GIVE REASONS.
1. food becomes acidic in stomach.
Ans: food becomes acidic in the stomach because of released of gastric juice, hydrochloric acid ,
pepsin and mucus into the stomach.
2. cardiac muscles are said to be involuntary muscles.
Ans: cardiac muscles are said to be involuntary muscles because they do not depend upon our will.
3. intoxicating substance should not be consumed.
Ans: intoxicating substance are harmful and cause cancer of various organs.
4. your muscles should be strong and efficient.
Ans: our strong muscles help in proper performance of many activity.
5. ANSWER THE FOLLOWING.
1. how many types of muscles are there ? which are those types?
Ans: there are three types of muscles skeletal muscles, heart or cardiac muscles and smooth muscles.
2. what causes the problem of acidity? what is its effect on the body?
Ans: in stomach gastric juice namely hydrochloric acid, pepsin and mucus nutrients. if excess of acid is produce it causes acidity. headache, vomiting, heart burns and skin rashes.
3. name the different types of teeth. what is the function of each type?
Ans: there are main four type of teeth. these are incisors, canines, premolars and molar. incisors help in biting, breaking something into a piece or for peeling. canines are not well developed in herbivorous animals and man. premolar and molars help in chewing and grinding the food.
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