Difference between dissection and surgery

Dissection is the cutting and separating of something for medical study///  surgery is medical procedure in which a patients body is manipulated usually by cutting open the body                                                                                   

Dissection - The act of cutting up a plant or an animal for study.
Surgery - The treatment of injuries or disorders of the body using incision or manipulation.

The difference is that surgery is performed upon living beings in an attempt to improve their quality of life and to fix/improve the injury or disorder that is troubling them. Dissection is cutting up a dead animal or plant so that you can study it.

Iwould say read. (b)