The name for it is an anatomist.
A person who studies the grass and soil, etc. is called a Agrostologist
A Mycologist studies fungi.
A person who studies nuts is known as a botanist. Botanists are experts who mainly study plants and their structural adaptations.
Lichenologist
What is the name of a person that studies organisms
A person who studies bees is called an apiologist.
An entomologist is a person who studies insects.
A person who studies audiology would be called an audiologist.
What is the name of a person that studies derivation of
mr. djw studies dinos
A dietician.
Etymologist
zoologist
An entomologist
Horologist
chiropterologist