Biology- e-learning portal --Photosynthesis and plant organs

Hi Students,

Here is the fifth list of sites you can go to to learn science in a fun way.
The site is good for quick revisions and introductions to the topics.


Topic: Photosynthesis and plant organs

1 experiments to see if chlorophyll and light are needed to make starch

http://kerala.skoool.in/content/KS3%20LOs/biology/chlorophyll_light_exp/index.html

2 the role of the leaf in photosynthesis
http://kerala.skoool.in/content/KS3%20LOs/biology/leaf_role_photosynthesis/index.html

3 testing a leaf for starch
http://kerala.skoool.in/content/KS3%20LOs/biology/leaf_starch_test/index.html

4 photosynthesis
http://kerala.skoool.in/content/KS3%20LOs/biology/photosynthesis/index.html

5 the rate of photosynthesis
http://kerala.skoool.in/content/KS3%20LOs/biology/photosynthesis_rate/index.html

6 difference between photosynthesis and respiration
http://kerala.skoool.in/content/KS3%20LOs/biology/photosynthesis_respiration/index.html

7 plant mineral requirements
http://kerala.skoool.in/content/KS3%20LOs/biology/plant_mineral_req/index.html

8 plant organs
http://kerala.skoool.in/content/KS3%20LOs/biology/plant_organs/index.html

9 water and mineral salt uptake
http://kerala.skoool.in/content/KS3%20LOs/biology/temp_enzymes/index.html



Cheers

Lesson on digestion of food

Hi,







I hope the 3 videos have helped you to understand:

-peristalsis, the wave-like rhythmic movement in the stomach and intestines to churn food and move food along the gut.

-mechanical digestion or chewing in the mouth. teeth break food into smaller particles

-chemical digestion or breaking down of food into smaller molecules so that they can be absorbed into the blood stream.

-producctionof of enzymes in mouth, amylase digests starch into maltose.

-production of enzyme pepsin and hydrochloric acid in the stomach. these help in the breakdown of proteins and kill germs in the food respectively.

-production of lipase and digestion of fats in the small intestine.

-villi in the small intestine to increase surface area in contact with digested food so that absorption is more efficient.

-absorption of digested food, small diffusible molecules into the blood stream.

-the circulatory system carries the food in the blood to all parts of the body for use or assimilation.

Cheers