Answer:
1. kidneys 2. Lungs 5. Pancreas
Explanation:
The body's balance between acidity and alkalinity in the human body is regarded as the acid-base balance which is measured on the basis of the pH and the concentration of carbon dioxide and bicarbonate in the blood. The organs that controls acid-base balance are lungs, kidneys and pancreas. Theses organs control blood pH by releasing carbon dioxide from the lungs because it is a waste product slightly acidic in nature and excreting excess of acids and bases from the body. 
 
        
             
        
        
        
Answer:
In experimental animals, such as mice, rats, and dogs, DDT has shown to cause chronic effects on the nervous system, liver, kidneys, and immune system.  It has also been found that humans, who were occupationally exposed to DDT, suffered chromosomal damage.
Explanation:
 
        
             
        
        
        
The answer is c a sperm reaches an egg in the Fallopian tube
        
                    
             
        
        
        
Answer:
They are all part of the nervous system.
Explanation:
The brain and the spinal cord are part of the central nervous system and the peripheral nerves are part of the peripheral nervous system. The nervous system works as the communication/ control system of the body. It transmits signals throughout the body.