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.
There are three main parts of the ear- the outer ear, the middle ear and the inner ear. The outer ear is just the pinna (the part that sticks out of the head) and the ear canal, which ends at the eardrum. The ear canal is where earwax accumulates. The middle ear is the space behind the eardrum. This space is drained and ventilated by a pathway called the Eustachian tube, which runs from the ear to the back of the nose. The inner ear is deep inside the skull, and is where the nerves and other structures controlling hearing and balance are located.