Physiologically, body temperature refers to the core temperature, that is, the average temperature in the deep body. Changes of tympanic membrane temperature and hypothalamic temperature-Therefore, tympanic membrane temperature can be used as an index of brain tissue temperature. ? Thin. The ear is already very small, and a membrane will definitely not be too big in the ear. As the name implies, the eardrum is a membrane in the ear. It's thin and a little translucent. If you clean your ears, it's easy to break this membrane. The area and volume are relatively small. The eardrum has a certain area and volume. Because its length and width are measured in millimeters, its area will be very small. In addition, its height is also very short, so its volume can also be calculated by area, so it can be concluded that its volume is not very large.
The effect is relatively large. The eardrum is the membrane of the inner ear and the outer ear. It accepts external sounds and provides people with auditory feelings through the nervous system. Its principle is that through the stimulation of sound waves, the eardrum vibrates, resulting in auditory feelings. This is the characteristic of tympanic membrane, but it is also fragile and needs more protection. The body surface temperature is unstable and easily influenced by environmental temperature, especially the temperature of skin and limbs fluctuates greatly, and the body core temperature is higher than the body surface temperature.
The tympanic membrane is inclined at an angle of 45 degrees with the sagittal plane and horizontal plane of the head, so the outer surface is in a forward, downward and outward position. The baby's eardrum is particularly inclined and almost horizontal. The outer layer of tympanic membrane is continuous with the skin of external auditory canal, and the inner layer is continuous with the mucosa of tympanum, with fibrous tissue in the middle.