Term | Definition |
Osteocyte | A bone-forming cell after it has left a Haversian canal. |
Osteomyletis | An infection of bone tissue. |
Ovary | The egg producing organ. |
Ovum | A female reproductive cell; an egg cell. |
Oxyhemoglobin | Hemoglobin containing oxygen-it is bright red in color. |
Papilla | Any projection of tissue above a normal surface. |
Parthenogenisis | The development of an egg which has not been fertilized. |
Pathology | The study of disease. |
Pericardium | A double walled sac of endothelial tissue surrounding the heart. |
Periosteum | The tissue which covers the outside of a bone. |
Peripheral Nervous System | The part of the nervous system lying outside of the central nervous system and containing the receptors and effectors. |
Peristalsis | A rhythmic, wave-like series of contractions moving over the walls of a tube and resulting in the passage of materials along the tube. |
Peritoneum | A layer of tissue that lines the abdominal cavity and surrounds many of the abdominal organs. |
pH | The symbol for hydrogen ion concentration. |
Phagocyte | A type of white blood cell that devours bacteria and other foreign bodies. |
Pharynx | The cavity in back of the mouth which is a common passageway to both the respiratory and digestive systems. |
Phenotype | The visible characteristics of an individual as determined by the genes. |
Phonation | The ability to produce sounds by means of vocal cords. |
Physiology | The study of the functions and activities of the various parts of the body. |
Pia Mater | The innermost of the meninges. |
Placenta | The organ on the wall of the uterus to which the embryo is attached by the umbilical cord and through which it receives its nourishment. |
Plasma | The fluid part of the blood. |
Plasma Membrane | The external covering of an animal cell. |
Pleura | A two-layered sac of endothelial tissue surrounding each lung. |
Plexus | A network of interlacing nerves, blood vessels, or lymphatics. |