Mercury in astrology

Mercury rules communication , transportation 

In health, it rules : 

Vocal cords 

Respiratory system 

Breathing system

TRANSPORTATION

actually transportation also Belongs to Mars, but because it carries things to move , then it can be part of Mercury

🚲 Bike 

🚳 Motorcycle 🏍️

🚗 Cars 

🐣 Yatch  

Above is the strength of my mercury planet. = 7 strong