The infantry brigade combat team, as of 2014, contains 4,413 soldiers and is organized around three battalions of infantry. Each type of brigade (light infantry, air assault, or airborne) has the same basic organization.
2.1 Structure and function of the outer and middle ear. Figure 1 is a diagram of the human ear. The outer ear consists of the visible part of the ear or pinna, the external auditory canal (meatus) , and the tympanic membrane (tympanum) or eardrum.The human pinna is formed primarily of cartilage and is attached to the head by muscles and ligaments.igure 1 is a diagram of the human ear. The outer ear consists of the visible part of the ear or pinna, the external auditory canal (meatus) , and the tympanic membrane (tympanum) or eardrum.
The auricle is also known as the pinna, and it is most commonly referred to as the ear. It is the most obviously visible part of the auditory system. An auricle consists of skin over contoured cartilage, and it is held in place by muscles and ligaments. Shape may differ by body type and person. Auricles are located on both sides of the head, near the temple and where the jaw meets the skull. Each ear is subdivided into the several regions. These include the lobule, the concha, the scafoid fossa, and other parts. The ear is the first part of the body to come in contact with auditory stimuli. Sound waves must pass over the auricle before entering the ear canal. Then, the waves pass through the tympanic membrane (eardrum) and into the middle ear.