Answer: I assume it would be to keep it from being less confusing.
Explanation: If you say on the left thoracic side on the body, you would be saying the left chest area. If you didn’t add that it was the left side it could mean anywhere in the chest and they could examine the wrong spot.
The previous statement is true because if a substance cannot get into a cell membrane it is assisted via protein channels however if it doesn't need the protein channels then it just flows through the membrane.
