Shivansh Shukla

ACTIVITY NUMBER 2

• Objective

• To study and be able to label all the organs involved in our digestive system.
• To understand how to correctly insert arrows in a diagram, understand their direction.

• Required substances

• Only a diagram consisting of the digestive system and the different parts of the same assisted with arrows.

• Step(s)

• Label all the parts of the digestive system neatly and carefully and observe the direction of the arrows.

• Conclusions

• Our digestive system constitutes of the following organs/parts:

1.  Buccal cavity: The food that we eat is ingested from here. It consists of:

1. Teeth: The teeth are used to break down our food into smaller particles physically.
2. Tongue: The tongue is used to mix food along with saliva so that it can be transported easily to the stomach through the oesophagus.
3. Salivary glands: These are the glands which are used to secrete saliva.

2.  Oesophagus: It is a long pipe like organ whose function is to merely transport the food from the buccal cavity to the stomach.

3.  Liver: The liver is the organ in which the food is mixed along with bile juice in order to proceed with the digestion process.

4.  Gall bladder: It is an organ used to store bile.

5.  Stomach:  This major organ acts as a storage tank for food so that the body has time to digest large meals properly. The stomach also contains hydrochloric acid and digestive enzymes that continue the digestion of food that began in the mouth.

6.  Pancreas: The pancreas secretes digestive enzymes into the small intestine to complete the chemical digestion of foods.

7.  Small intestine: The small intestine is mainly concerned with absorbing the food through the villi which are located on it’s walls to increase the surface area. Till the time food exits the small intestine, 90% of the nutrients have been extracted from it.

8.  Large intestine: The large intestine absorbs water and contains many symbiotic bacteria that aid in the breaking down of wastes to extract some small amounts of nutrients.

9.  Rectum: This is the organ which temporarily stores the faeces.

10.  Anus: This is the organ through which the waste material exits our body (excretion).

• The arrows which are placed in a diagram are to be in the way they are in the following image: 

Apart from the post, I would like to thank my science teacher, Mrs. Rina Krishnan, for she was the one who provided us (my whole class) with this diagram and helped us understand our mistake of marking the arrows.

 Grazie amile signora!!!