Short answer type question :
1.(a) what is the role of mucus in stomach.
(b)what is the role of hydrochloric acid in stomach
2. What is alimentary canal? Name the various parts of alimentary canal and the associated glands.
3. Which part of the alimentary canal is involved in :
a.absorption of food?
b. Chewing of Food?
c. Killing of bacteria?
d. Complete digestion of food
e. Formation of faeces?
4. Which organ of the body secretes bile? Where is bile stored? What is the function of bile in the digestion of Food?
5. What are villi? Where are villi located? What is the function of villi?
Long answer type question :
1. What is meant by tooth decay? Name some of the foods which are the major cause of tooth decay. What are the various ways of preventing tooth decay?
2. What is meant by digestion? Name the various organs of the human digestive system. Also name the associated glands.
3. Name three things secreted by the inner lining of our stomach. Also state their functions. What is the function of large intestine?
5. What are incisors, canines, premolars and molars? State their functions.
Class - 7
Answers
Answer:
hi bro I am studying in class 6th
“YOUR ANSWERS ALL”
Short answer type question :
1.a.] Mucus protects the lining of stomach from its own secretions of hydrochloric acid.
1.b.] The hydrochloric acid in the gastric juice breaks down the food and the digestive enzymes split up the proteins
2.] The alimentary canal is mainly referred to as the pathway by which food enters our body and moves out through the anus after digestion.
The main parts are mouth, pharynx, esophagus, stomach, small and large intestines, rectum and anus.
3.a.] Small Intestine.
3.b.] Buccal Cavity.
3.c.] Stomach and Mouth.
3.d.] Small Intestine.
3.e.] Rectum
4.] Bile is a fluid that is made and released by the liver and stored in the gallbladder. Bile helps with digestion. It breaks down fats into fatty acids, which can be taken into the body by the digestive tract.
5.] Villi are small finger-like projections located in the walls of the small intestine. Their function is to increase the surface area in order to maximise the absorption of digested food.
Long answer type question :
1.] Cavities are permanently damaged areas in the hard surface of your teeth that develop into tiny openings or holes. Cavities, also called tooth decay or caries, are caused by a combination of factors, including bacteria in your mouth, frequent snacking, sipping sugary drinks and not cleaning your teeth well.Tooth decay occurs when foods containing carbohydrates (sugars and starches), such as breads, cereals, milk, soda, fruits, cakes, or candy are left on the teeth. Bacteria that live in the mouth digest these foods, turning them into acids.
2.] The digestive system in human beings consists of alimentary canal and associated digestive glands. The alimentary canal consists of mouth, oesophagus, stomach, small intestine, large intestine and anus. The associated glands consist of salivary glands, liver, pancreas, gastric and intestinal glands.Glands contributing digestive juices include the salivary glands, the gastric glands in the stomach lining, the pancreas, and the liver and its adjuncts—the gallbladder and bile ducts.
3.] Hydrochloric acid, Mucus, digestive juices are secreted from the inner lining of our stomach.
: The hydrochloric acid in the gastric juice breaks down the food and the digestive enzymes split up the proteins. The acidic gastric juice also kills bacteria. The mucus covers the stomach wall with a protective coating.
: Our stomach is lined by a protective layer of mucus , which is responsible for creating the enzymes that help your body digest proteins. It is a protective barrier to stomach acid, bile salts, pancreatic enzymes, macromolecules.Glands in your stomach lining make stomach acid and enzymes that break down food. Muscles of your stomach mix the food with these digestive juices. Pancreas. Your pancreas makes a digestive juice that has enzymes that break down carbohydrates, fats, and proteins. Mainly protein digestion occurs in stomach. HCl also kills the bacteria that may have enter along with the food we eat. The digestive juices break down proteins into smaller substances.
4.] Incisors are the teeth that you use to bite into your food. Canines - Your canines are the next teeth that develop in your mouth. You have four of them and they are your sharpest teeth, used for tearing apart food. Premolars - Premolars are used for tearing and crushing food.The four front teeth in both the upper and lower jaws are called incisors. Their primary function is to cut food. The two incisors on either side of the midline are known as central incisors. The two adjacent teeth to the central incisors are known as the lateral incisors.