Q1. Answer the following:-
1. How many types of muscles are there? Which are those types?
2. What causes the problem of acidity? What is its effect on the body?
3. Name the different types of teeth. What is the function of each type?
Q2. Sketch and label a diagram of the digestive system and describe it in your
own words.
Answers
Answer:
hope these attachments will help u.
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Required AnswEr:-
Q1. Answer the following:-
1. How many types of muscles are there? Which are those types?
➢ The muscles are of three main types:
- Skeletal or voluntary muscles
- Cardiac muscle
- Smooth or involuntary muscles
2. What causes the problem of acidity? What is its effect on the body?
➢ Acid is produced by stomach. It is mild 0.5% HCl. If excess of acid is produced it causes headache, heart burns, vomiting or skin rashes.
3. Name the different types of teeth. What is the function of each type?
➢ There are main four types of teeth. These are:
- Incisors
- canines
- premolars
- molars.
☞ Incisors help in biting, breaking something into a piece or for peeling.
☞ Canines are not well developed in herbivorous animals and man. They
are basically for killing a prey.
☞ Premolars and molars help in chewing and grinding the food.
Q2. Sketch and label a diagram of the digestive system and describe it in your own words.
❒ Diagram {Refer the attachement}
The digestion of food starts from mouth cavity:
☞ Mouth – Digestion of food begins in the mouth. Food is chewed with
the help of teeth into very small pieces.
☞ Salivary glands – Saliva is produced in the salivary glands in the mouth cavity, located in the front of ears, near the pharynx and below the tongue. It is carried to the mouth via ducts. It is mixed with food during the process of chewing.
☞ Pharynx/Thorat – The oesophagus and trachea open into the pharynx.
☞ Oesophagus – It is a tube leading from the pharynx to the stomach. It pushes the food towards the stomach.
☞ Liver – The liver is the largest gland in the body. It has a rich supply of blood. Its main function is storage of glucose. The gall bladder is situated below the liver. It stores the bile, the digestive juice secreted by the liver. When bile is carried into the small intestine, it mixes with the food there and helps in the digestion of fats. Bile contains bile salts.
☞ Pancreas – The pancreas secretes the pancreatic juice that contain various enzymes.
☞ Stomach – The large sac - like part of the alimentary canal is called the stomach. The gastric glands of stomach secrete gastric juice. Food that has entered stomach is churned. Three components of gastric juice, namely, HCl, pepsin, and mucus are mixed with food here and it becomes acidic. Mainly proteins are digested in the stomach. Due to the churning and the action of gastric juice, food becomes a semi - solid slurry which is slowly pushed into the small intestine.
☞ Small intestine – The small intestine is about 6m long. Most of the digestion and absorption of food takes place here. Three different digestive juices are mixed with the food in the small intestine. Absorption into the blood, of nutrients obtained by the digestion of food, also occurs in the small intestine.
☞ Large intestine – The large intestine is about 1.5m long. Only water is absorbed in the large intestine. A small part called the ‘appendix’ is attached to the first part of large intestine. Undigested remains of the food digested in the small intestine enter the large intestine. Undigested material is thrown out of the body through the anus.
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