Final answer:
The proper word division for the medical term "transthoracotomy" is "trans-tho-ra-cot-o-my," which denotes a surgical procedure involving an incision through the chest wall.
Step-by-step explanation:
The proper word division for the term "transthoracotomy" is "trans-tho-ra-cot-o-my."
This term refers to a medical procedure involving an incision through the thoracic wall to gain access to the chest cavity, commonly during surgery on the organs within the thorax.
The breakdown of the word into its component parts can help understand its meaning: "trans" (across), "thoraco" (relating to the thorax or chest), and "otomy" (incision or cutting).