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 Outer Ear. Parts of the Ear: Outer Ear | Middle Ear | Inner Ear. The outer ear consists of the pinna, or auricle, and the ear canal (external auditory meatus). The pinna â the part of the ear that we see on each side of our heads â is made of cartilage and soft tissue so that it keeps a particular shape but is also flexible. The pinna serves as a collector of sound vibrations around us and guides the vibrations into the ear canal.