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.
Your ears are not just for hearing â they are also important for controlling position sense and balance. Each ear is divided into 3 sections: the outer; middle; and inner ear. The middle and inner parts of the ear are located in hollow cavities on either side of the head within the temporal bones of the skull. The outer ear. The external part of your ear consists of the pinna and ear lobe. The pinna is the shell-like part of your external ear, and is made of cartilage and skin. It directs sound waves from the outside into your external auditory canal (ear canal), which in turn channels sound waves to the tympanic membrane (also known as the ear drum). The tympanic membrane is a thin, semi-transparent membrane that separates the outer and middle ear.