In what way wood understanding the body positions directions and planes assist you with tasks related to the individual body systems

The study of body positions, directions and planes is called human anatomy. Having a sound knowledge of human anatomy is very important, especially for an health provider for  many reasons. Here are some of the importance:
1. Sound understanding of human anatomy will enable a health professional to know the precise site of disorder when attending to patients. This is extremely important especially when surgery is involved. The site to be operated upon must be known precisely and that is the place the surgeon will open for correction. Trial and error is not allowed in this case.
2. Knowing body organs, their natures and their functions will enable a health provider to notice quickly when an abnormality is present. 

The answer would be d. most contraceptives are effective when used properly