By heemaal ahmed
2

The main Organ of gas exchange for human is lugs and the place in the lungs in which the gas exchange takes place is the Alveolus.
Hope i helped you, and thanks for asking.

Zackaria Ahmed
By Thomas Schmitt

many say silica particles are designed for applications requiring monodisperse inorganic spheres,

1

Well silica particles are also used in cutting, grinding, drilling, sanding, mixing, or demolishing materials containing silica. And there is a major risk factor with too according to http://www.bestessays-writer.com/essay.html blogs articles. Tiny one's can be inhaled into lungs in construction industry. It hampers health.

balayuin kim
By Ronae Patterson
1

C6H1206+6O2->6CO2+6H2O (Glucose and oxygen make carbon dioxide and water.) The glucose comes from food or photosynthesis in plants and the oxygen from the air. The carbon dioxide is released into the atmosphere when we breathe out and the water is used in cells or released.

Bethany F

Register for S-cool Revision Tools

2016 was extraordinary, but how are you feeling about your 2017?
I'm feeling lucky! It'll be good.
27%
I'm nervous but I'm going to be OK.
27%
There is lots to do - I'm already exhausted!
26%
Aaaarggghhh!!!!!
21%
Total votes: 253