ATI TEAS
ALL SECTIONS PREP
ANATOMY & PHYSIOLOGY
Anatomy: is what you see with your eyes in the human body.
Microscopic Anatomy: examines cells and molecules.
Cytology: study of cells.
Histology: study of tissues.
Physiology: is the study of functions of anatomical structures.
*Smallest living is a CELL.
*Smallest organisms is a ATOM.
Levels of Hierarchy
Atom- the most basic complete unit of an element.
Molecule- a group of atoms bonded together, representing the smallest fundamental unit of a
chemical compound that can take part in a chemical reaction.
Organelles- are cells parts that function within a cell.
Cells- the basic structural unit of an organism from which living things created. Is one individual
cell.
Tissues- a group of cells with similar structure that functions together as a unit, but at a lower
level than organs.
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