Answer: Those parts is were all the oxygen is distributed through the human body, and so technically it can be considered the respiratory system.
Answer:
A heart is a cardiac muscle.
Explanation:
It pumps blood through the body.
Answer:
The food adulterants and the chemical compound present in the food are harmful for the living organisms. The junk food increases the chances of obesity and health related disease.
The humans knows that the smoking and excess drinking of coca cola can cause harmful effect in their body. But this is human psychology that the knowing about the harmful effect of a particular substance cannot change the drinking or eating behavior of an individual.
