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प्रश्न
Write down the explanation.
Explain why human dentition is considered as thecodont, diphydont and heterodont.
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उत्तर
- Human dentition is described as thecodont, diphyodont and heterodont.
- It is called thecodont type because each tooth is fixed in a separate socket present in the jaw bones by gomphosis type of joint.
- It is called diphyodont type because we get only two sets of teeth, milk teeth and permanent teeth.
- It is called heterodont type because humans have four different type of teeth like incisors, canines, premolars and molars.
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संबंधित प्रश्न
Digestion of starch starts in the stomach.
Why do we get instant energy from glucose?
Which part of the digestive canal is involved in:
Formation of faeces ______.
Label the following figure of the digestive system.
A part of the human digestive system
What is meant by life processes? Name the basic life processes common to all living organisms which are essential for maintaining life.
The length of small intestine in a human adult is about:
(a) 4.5 m
(b) 1.5 m
(c) 3.5 m
(d) 6.5 m
If the saliva is lacking in salivary amylase, then which of the following processes taking place in the buccal cavity will be affected?
(a) proteins breaking down into amino acids
(b) starch breaking down into sugars
(c) fats breaking down into fatty acids and glycerol
(d) intestinal layer breaking down leading to ulcers
Prepare a possible vegetarian menu for your dinner which would provide all the necessary nutrients.
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Answer the following question.
Write two different ways in which glucose is oxidized to provide energy in the human body. Write the products formed in each case.
Write the function of the following in the human alimentary canal:
HCl in stomach
Write four sequential steps of the procedure of the experiment "Preparing a temporary mount of a leaf peel to show stomata".
Fill in the blank.
Steapsin is also called _________
Find the odd one out. Give reasons for your choice.
Define with examples: Omnivores
Define digestion.
Describe the digestion of food in small intestine.
Correct the spellings: Bilirubin
Give a reason.
Food becomes acidic in the stomach.
Sketch and label a diagram of the digestive system and describe it in your own words.
Use your brain power!
Why do we sometimes choke suddenly while eating?
Answer the following question.
Small Intestine is very long and coiled. Even if we jump and run, why it does not get twisted? What can happen if it gets twisted?
Write any two functions of digestive system.
Throughout the length of the alimentary canal the layer which shows the presence of goblet cells is ______
The coiled middle portion of the small intestine which is 2.5 meters long is the ______.
Digestion of starch begins in the ______.
What are the compounds present in the food?
In human beings, when the process of digestion is completed, the (i) proteins, (ii) carbohydrates and (iii) fats are respectively finally converted into ______.
