LIFE PROCESS
Life on the earth exists based on certain functions and processes. There are some processes for obtaining nutrition, some help in procreating offspring. The processes which maintain body functions and are necessary for survival are called life processes. The important life processes are nutrition, transportation, movement, reproduction, respiration, and excretion.
2) Define autotrophic nutrition?
The literal meaning of this term is self nutrition.Autotrophic Nutrition is a process where the organism prepare their own food from the simple inorganic materials like carbon dioxide, water and mineral salts in the presence of sunlight. All the green plants possess autotrophic mode of nutrition.
3) Define heterotrophic nutrition?.
Every non-autotrophic organism which depends on others for their food is called heterotrophs. Heterotrophs include every animal and non-photosynthetic plant which are unable to prepare organic molecules on their own.
4) What are the functions of stomata?
The tiny pores or openings present under the leaves of the plants is called stomata.
Two functions of stomata:
(i) It helps in breathing of the plants.
(ii) It helps in exchange of gases which takes place inside the plant cells.
ACTIVITIES
DATE 21.04.17
1) To study about peristaltic movement in food pipe using a tyre tube
First take the tyre tube and cut it so that it becomes flat and then add some mud in it from one end of the pipe and then close that end of the pipe.
Then by doing contraction and expansion in the pipe by hands we try to push the food in downward direction and this is in the same way as it happens in our food pipe, our muscles contract and expand in order to push the food in downward direction.
After some time we observed that the mud has come out of the other end of the pipe.
Observation: We have observed that the mud in the tyre tube has came out of the other end of the pipe the movement caused by the expansion and contraction of the food pipes.
2) Labelling of different parts of the digestive system in human body and learned their function.
A diagram of human digestive track was given to us in which there were blanks for writing different names of the organs associated with digestion.
After a little bit of discussion we have filled the blanks of that paper and then told the functions of the different organs.
We had learned a new thing in this activity about labelling that was a small and common thing but was very important.
we had learned about the arrows we use for labelling that the arrow should face in direction of the organ we have to write in its opposite
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