Answer the following:
11. Define the following terms:
i) Ingestion ii) Digestion iii) Assimilation iv) Absorption
12. Name the organs that make up the human alimentary canal.
13. What is saliva and where is it produced?
14.Fill in the blanks:
i) The white hard substance that covers the teeth is called ____________.
ii) The semi-digested food that is chewed again by ruminants is called ______.
iii) The place of completion of digestion is ______.
iv) Absorption of water and release of faeces takes place in ________.
v) The digestive juices contain enzymes called ___________.
15.Name the following
i)Bony structure that grinds and cuts the food.
ii)Special substances that are present in the food.
iii)Largest gland of our body.
16.Practice the following diagrams
i) Nutrition in Amoeba ii) Hydra capturing food iii) Types of teeth in human beings iv)Human digestive system v) Digestion in ruminants
17. Briefly explain the process of digestion in ruminants.
18. What is saliva and how is it produced?
19. What is peristalsis? Explain with the help of a diagram.
20. Write short notes on
i) Nutrition in amoeba ii)Nutrition in hydra
No need of question 16
Answers
Answer:
Ingestion:
the process of taking food, drink, or another substance into the body by swallowing or absorbing it.
Digestion:
the process of digesting food
Assimilation:
- the process of taking in and fully understanding information or ideas.
- "the assimilation of the knowledge of the Greeks"the absorption and digestion of food or nutrients by the body or any biological....
Absorption:
The process through which the end products of digestion are absorbed into the blood or lymph from the intestinal mucosa is called as Absorption. This process occurs either by the passive, active or facilitated transport mechanisms in the body. The small intestine is the organ where absorption occurs.
Answer:
11)i) The process of taking food, drink, or another substance into the body by swallowing or absorbing it.
ii) The process of digesting food.
iii) The absorption and digestion of food or nutrients by the body or any biological system.
iv) The process by which one thing absorbs or is absorbed by another.
12) The parts of the alimentary canal listed in order are the mouth, pharynx or throat, oesophagus, stomach, small intestine and large intestine.
13) Saliva is an extracellular fluid produced and secreted by salivary glands in the mouth. Saliva is produced and secreted by major and minor salivary glands lining the inner lip and soft palate.
14)i) Enamel
ii) Cud
iii) Small Interstine
iv) Large Interstine
v) Digestive Enzymes
15)i) Teeth
ii) Nutrients
iii) Liver
17) Tasting and chewing in the digestion process , Swallowing food: The slide from oesophagus to stomach , Digesting food in the stomach , Pulling out nutrients in the small intestine , The end of the digestive line: Excreta .
18) Saliva is an extracellular fluid produced and secreted by salivary glands in the mouth. Saliva is produced and secreted by major and minor salivary glands lining the inner lip and soft palate.
19) Peristalsis is a radially symmetrical contraction and relaxation of muscles that propagates in a wave down a tube, in an anterograde direction. In much of a digestive tract such as the human gastrointestinal tract, smooth muscle tissue contracts in sequence to produce a peristaltic wave, which propels a ball of food along the tract.
20)i) Amoeba is an important protozoa found in fresh water. It feeds on microscopic plants and animals present in water. The mode of nutrition in amoeba is Holozoic. And the process of obtaining food by amoeba is called phagocytosis.
ii) It feeds on small plants and animals present in water.
Explanation:
