Advertisements
Advertisements
प्रश्न
Write down the explanation.
Explain why human dentition is considered as thecodont, diphydont and heterodont.
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Match the items of Column I with suitable items in Column II.
| Column I | Column II | ||
| (a) | Salivary gland | (i) | Bile juice secretion |
| (b) | Stomach | (ii) | Storage of undigested food |
| (c) | Liver | (iii) | Saliva secretion |
| (d) | Rectum | (iv) | Acid release |
| (e) | Small intestine | (v) | Digestion is completed |
| (f) | Large intestine | (vi) | Absorption of water |
| (vii) | Release of faeces |
Carbohydrates are bodybuilding nutrients.
Name the enzyme present in human saliva. What type of food material is digested by this enzyme?
Which of the organs performs the function in humans?
Absorption of food
What substance is mixed with food in the mouth during chewing by the teeth?
Define holozoic nutrition.
What substances are contained in pancreatic juice? What are their functions?
What causes movement of food inside the alimentary canal?
What is dental plaque? What harm can it do? How can the formation of plaque be prevented?
Name the main organs of the human digestive system. Also name the associated glands.
The process of digestion in humans is completed in:
(a) oesophagus
(b) small intestine
(c) stomach
(d) large intestine
How is thorough chewing of food helpful in digestion?
Write True or False in the following statement
Molars help in cutting and tearing food.
What is the role of the liver and the pancreas respectively in the digestion of food?
Name the types of teeth seen in humans.
How is the small intestine best suited for the digestion and absorption of food?
Define the following term:
assimilation
Fill in the blanks.
Pepsin acts on ________ to change them into _______ and __________.
Find the odd one out. Give reasons for your choice.
Give reasons for the following:
All teeth in the mouth are not alike.
Write short answers
What do you mean by the emulsification of fat?
Describe protein digestion in the human.
How do we know that we are hungry and that we should now eat?
List out the functions of the digestive system.
Choose the odd one:
What will happen if the mucus is not secreted by the gastric glands?
What are the functions of gastric glands present in the wall of the stomach?
Describe the alimentary canal of man.
Fill in the blanks using the words listed below.
| water, front, intestinal, salts, pseudopodia, back, vacuole |
- The digestion of all food components is completed by the ______ juice.
- Large intestine absorbs ______ and some ______ from the undigested food.
- Tongue is attached at the ______ to the floor of the mouth cavity and is free at the ______.
- Amoeba pushes out ______ around the food and traps it in a food ______.
