A particle that makes up an atom; carries a positive charge.
Proteoglycan
A chemical (mucopolysaccharide) found in the ground substance of connective tissue.
Protein
Organic compounds that have carbon, hydrogen, oxygen and nitrogen.
Prostatic Urethra
The part of the male urethra that passes through the prostate.
Prostate Gland
Located around the proximal part of the male urethra; its secretions are responsible for the milky color of semen.
Proprioceptor
Afferent that monitors position and movement of skeletal muscles and joints.
Pronation
A movement in which the elbow is moved to have the palm of the hand facing the back;
Proliferative Phase
The menstrual phase in which there is development of the ovarian follicles; the preovulatory of follicular phase.