1. What is alimentary canal? Name the various parts of alimentary canal and their associated
II. Answer the following questions in short:
2. Why human beings cannot digest cellulose? Explain giving reason.
3. What are villi? Where are villi located? What is the function of villi?
4. How many sets of teeth does a human have during his life time?
5. Describe the process of nutrition in Amoeba.
Answers
Answer:
( answer 1) Defination~ Gastrointestinal tract, also called digestive tract or alimentary canal, pathway by which food enters the body and solid wastes are expelled. The gastrointestinal tract includes the mouth, pharynx, esophagus, stomach, small intestine, large intestine, and anus.
or
The alimentary canal is a major part of the digestive system. It is a continuous muscular tube which runs through the body and it is around 8 to 10 meters long. ... The alimentary canal performs the function of digesting food. It breaks it down to smaller pieces and aids in the absorption of the digested food.
various organs of alimentary cannal are as followed......
The organs of the alimentary canal are the mouth, pharynx, esophagus, stomach, small intestine, and large intestine. The accessory digestive structures include the teeth, tongue, salivary glands, liver, pancreas, and gallbladder
( answer 2)Humans are unable to digest cellulose because the appropriate enzymes to breakdown the beta acetal linkages are lacking. (More on enzyme digestion in a later chapter.) Undigestible cellulose is the fiber which aids in th helps u e smooth working of the intestinal tract. ... No vertebrate can digest cellulose directly
(( answer 3) 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.
( answer4) humans have 20 primary teeth and 32 secondary (permanent) teeth during their lifetime.
( answer 5) Nutrition in an Amoeba occurs through a process called phagocytosis where the entire organism pretty much engulfs the food it plans on eating up. The mode of nutrition in amoeba is known as holozoic nutrition. It involves the ingestion, digestion and egestion of food material.
hope this helps u and mark me as a brainlist ....plzzzzzzzz