Question

question
the science concerned with the medical study of blood and blood - producing organs is called _________.
answer
hematology
endocrinology
cardiology
histology
i dont know yet

Explanation:

Hematology is the medical study of blood and blood - producing organs. Endocrinology focuses on hormones and endocrine glands. Cardiology is about the heart. Histology is the study of tissues.

Answer:

hematology