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.
11. Image courtesy of NASA. The structure of the ear can be divided into three main parts: the outer ear or pinna, the middle ear and the inner ear. The outer structure of the ear is responsible, in part, for helping us to place the original location of a sound, be it ahead or behind, above or below us.It also helps to funnel and focus sound waves on their way to the middle ear and auditory canal.he most fascinating aspect of perception takes place in an area of the cochlea called the basilar membrane. The cochlea is a tapered tube, which circles around itself like the scroll on a violin. The basilar membrane divides the tube lengthwise into two fluid-filled canals, which are joined at the tapered end.