Organ developed during pregnancy in which metabolic exchange occurs between the fetus and the mother.
Pituitary Gland
Endocrine gland attached to the brain, located in the Sella Turcica of the sphenoid bone, the hypophysis.
Pineal Gland
Endocrine gland located in the roof of the third ventricle of the brain; secretes the hormone melatonin.
Pia Mater
The inner layer of the meninges.
Physiology
The study of the functions of the various body parts.
Pysiologic Dead Space
The volume of air in alveoli not perfused by blood and is nor, therefore, involved in gas exchange.
Phospholipid Bilayer
The structure of the cell membrane; made up of two layers of phospholipids.
Phonation
Sound production in the larynx.