Explanation

Dermatology:  Study of skin 

It involves the study of health conditions that may affect the skin, fat hair, nails, and membranes. 

Additional information:

Agrostology: Study of Grasses 

Agronomy: soil management and crop production 

Odontology: study of teeth 

Arthrology: Study of joints 

Nephrology: study of kidneys

Hematology: Study of blood