Definition: Anatomist is a medical doctor who studies the structure, function, and relationship between bones, muscles, organs, blood vessels, nerves, and other parts of the human body. Definition: A person trained in anatomy who uses his or her knowledge of anatomy to study and understand the various parts of the human body. Anatomists study the structure, function, and relationships between different parts of the body, including bones, muscles, organs, blood vessels, nerves, and other structures that make up the human body.