What is histology the study of?

Histology is the study of the microscopic structure of tissues. This branch of anatomy focuses on examining tissues at a cellular level, enabling researchers and medical professionals to understand the composition, organization, and function of the various types of tissues found in the body. By using techniques such as microscopy, histologists can identify abnormalities and changes that may be indicative of disease.

The other options relate to different fields of study. Macroscopic structure refers to the examination of organs and systems visible to the naked eye, which is not the focus of histology. The cellular structure of blood pertains to hematology, which specifically studies blood cells and their functions, while developmental biology involves understanding the processes that lead to the growth and development of organisms, not specifically the tissue structures. Therefore, histology's clear focus on microscopic tissue structure makes it distinct and vital in medical science.