Pineal Gland Essentials. 1  Of the endocrine organs, the function of the pineal gland was the last discovered. 2  Located deep in the center of the brain, the pineal gland was once known as the âthird eye.â. 3  The pineal gland produces melatonin, which helps maintain circadian rhythm and regulate reproductive hormones.
View Full Document. 59) Which of the following anatomical terms refers to the ear? a) otic b) orbital c) ocular d) oral e) occipital Answer: a Difficulty: Hard Learning Objective 1: LO 1.5 Describe the anatomical position and how anatomical terms are used to describe the human body.
Medical Definition of Inner ear. Inner ear: A highly complex structure whose essential component for hearing is the membranous labyrinth, where the fibers of the auditory nerve connect the ear to the brain. The membranous labyrinth is a system of communicating sacs and ducts (tubes) filled with fluid (endolymph), and it is lodged within a cavity called the bony labyrinth.