Dr. mitchell performs open heart surgery. the incision he makes through the sternal region of his patient divides the thoracic cavity into equal left and right parts. this incision must be made along a:

The incision of the open heart surgery should be along the sternum and typically 6 to 8 inch long.

Explanation;Open heart surgery is thought to be the major surgery in adults.It is usually the surgery of open heart in which heart is exposed to the surgeon by the incision which is in the middle of ribs and thoracic cavity.In advance techniques incision length is only 2 to 4 inches and it takes average four weeks to fully recover.It is commonly used for coronary artery bypass grafting (CABG).

The salt in the sea water dehydrated the sailor because her body could not take in the amount to salt in the sea water