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.
Ear Anatomy. Anatomy of the Ear. The external ear (or pinna, the part you can see) serves to protect the tympanic membrane (eardrum), as well to collect and direct sound waves through the ear canal to the eardrum. About 1Â¼ inches long, the canal contains modified sweat glands that secrete cerumen, or earwax.