Answer:
Exercise causes the heart to pump blood into the circulation more efficiently as a result of more forceful and efficient myocardial contractions, increased perfusion of tissues and organs with blood, and increased oxygen delivery.
Explanation:
 
        
             
        
        
        
Answer:
Production for Medical Use
Explanation:
There are some examples where human hormone genes are excised and placed into bacterial DNA.  An example of this is Human Growth Hormone, which is mass-produced for human use by bacteria.
 
        
             
        
        
        
Answer:
The purpose of the organs of the male reproductive system is to perform the following functions: To produce, maintain, and transport sperm (the male reproductive cells) and protective fluid (semen) To discharge sperm within the female reproductive tract during reproduction
 
        
             
        
        
        
Holes will form in the atmosphere allowing more heat energy from the sun to reach Earths surface causing temperatures to rise