| Term | Definition |
| Anatomy | study of the structure and relationship between body parts |
| Physiology | study of the function of body parts and the body as a whole |
| Histology | study of tissures at the microscopic level |
| Cytology | study of cells at the microscopic level |
| Neurophysiology | study of how the nervous system works |
| Cell | smallest unit of life |
| tissue | group of similar cells performing a common function. |
| Organ | group of different kinds of tissues working together to accomplish a particular task |
| Organism | system possessing the characteristics of living things |
| Superior | Above another structure, |
| Inferior | Below another Structure, |
| Anterior...or Ventral | Toward the front of the body. |
| Posterior,..or dorsal | Toward the back of the body |
| Medial | Toward the midline of the body... |
| Lateral | Away from the midline of the body.. |
| Ipsilateral | on the same side of the body. |
| Contralateral | On opposite sides of the body. |
| Intermediate | Between two structures. |
| Proximal | Clowse to the point of attachment of a limb. |
| Distal | Farther from the point of attachment of a limb. |
| Superficial | Toward the surface of the body. |
| Deep | Away from the surface of the body. |
| Sagittal planes | divide a body or organ vertically into a right and left part. |
| Frontal ( Coronal) plane | divides the body or organ vertically into a front and rear part |
| Horizontal (trnasverse) plane | divides the body or organ horizontally into a top and bottom part |
| Dorsal (back) Cavities | ody cavity includes the cranial cavity (which contains the braina) and the Vertebral cavity (which contains the spinal cord) |
| Ventral (front) Cavities | includes thoracic cavity (which contains the lungs, each in its own pleural cavity, and the heart, in the pericaridal cavity ) and abdominopelvic cavity (which contains the digestive organs in the abdominal cavity and the bladder and reproductive organs in the pelvic cavity.) |