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Question
Sketch and label a diagram of the digestive system and describe it in your own words.
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Solution
Digestive system
The major constituent organs of the human digestive system are the buccal cavity, oesophagus, stomach, small intestine, large intestine, rectum, and anus.
- Buccal cavity: It includes the teeth, saliva and tongue. The teeth break down the food. Digestion of food begins in the mouth. The tongue helps in the chewing and swallowing of food.
- Oesophagus: The food passes from the mouth, down the oesophagus, into the stomach as a result of the movement of the walls of the oesophagus.
- Stomach: It mixes the food received from the oesophagus with digestive juices.
- Small intestine: The food from the stomach moves into the small intestine, which receives intestinal juices from two.
- Gallbladder: Stores bile and releases it into the small intestine when needed.
- Pancreas: Produces enzymes that help digest proteins, fats, and carbs.
- Glands: the liver and pancreas. These juices help in the further digestion of food.
- Large intestine: Water is absorbed in the large intestine.
- Rectum and anus: Undigested food particles are thrown out with the help of the rectum and anus.
RELATED QUESTIONS
Which part of the digestive canal is involved in:
Chewing of food ______.
Which part of the digestive canal is involved in:
Killing of bacteria ______.
Which of the organs perform the following functions in humans Absorption of water?
In which part of the digestive system is water absorbed?
Name the biological catalysts which bring about chemical digestion of food.
Which of the following has the longest small intestine?
(a) carnivore
(b) omnivore
(c) herbivore
(d) autotroph
In human digestive system, bile is secreted by:
(a) pancreas
(b) liver
(c) kidneys
(d) stomach
List two different functions performed by the pancreas in our body.
Name the digestive juice secreted by the stomach and give its function.
What do you mean by the absorption of food?
Define the following term:
Digestion
Define homodont dentition.
Observe the diagram given alongside and answer the following:
- Name the parts numbered 1-8.
- Which parts shown in the diagram are non-living?
- Is the tooth suited for cutting, tearing or grinding?
- What is the function of parts 8 and 7?
- What is the total number of teeth present in adult human beings?
- Write the dental formula of human beings.
Correct the spellings: Ptorein
Name the enzymes secreted by the following: Ileum
Observe the diagram. This is the histological structure of the stomach. Identify and comment on the significance of the layer marked by an arrow.
Name the salivary glands in our mouth?
Digestion of starch begins in the ______.
A gland not associated with the alimentary canal is ____________.
Match the following:
| 1. | Pancreatic juice | a. | Breaking starch |
| 2. | Salivary enzymes | b. | Digestive enzymes |
| 3. | Salivary gland | c. | Alimentary canal |
| 4. | Digestive tract | d. | Parotid |
