However, the Marine will not have served the required 8 months time in grade until 15 January 2004. Based on the eligibility requirements listed in paragraph 2400 the first promotion quarter the Marine will be eligible is January, February and March 2004.Note the Marine is not eligible for promotion 1 January 2004 because they did not meet the 8 months time in grade requirement until 15 January 2004.ased on the eligibility requirements listed in paragraph 2400.1b, the first promotion quarter the Marine will be eligible for promotion to Cpl is April 2005. Note that the Marine is not eligible for promotion 1 January 2005 because he/she did not meet the 8 months time in grade until 15 January 2005.
The inner ear is made up of two components. The cochlea is involved with hearing. The vestibular system helps with balance. The cochlea is a snail-shaped chamber filled with fluid. It is lined with special sensory cells called hair cells. These cells transform sound waves into electrical signals.
The anatomy of the ear can be a little confusing, especially since the ear is responsible not only for hearing, but also for balance. There are three components to the ear: the outer ear, the middle ear and the inner ear. All three are involved in hearing but only the inner ear is responsible for balance.The outer ear is composed of the pinna, or ear lobe, and the external auditory canal.Both structures funnel sound waves towards the ear drum or tympanic membrane allowing it to vibrate. The pinna is also responsible for protecting the ear drum from damage. Modified sweat glands in the ear canal form ear wax.he anatomy of the ear can be a little confusing, especially since the ear is responsible not only for hearing, but also for balance. There are three components to the ear: the outer ear, the middle ear and the inner ear. All three are involved in hearing but only the inner ear is responsible for balance.