A branch of medicine studying blood and its disorders is called _____?

A branch of medicine studying blood and its disorders is called _____?

خون اور اس کے امراض کا مطالعہ کرنے والی طب کی ایک شاخ کو کیا کہا جاتا ہے؟
Explanation

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