The inner ear (internal ear, auris interna) is the innermost part of the vertebrate ear. In vertebrates, the inner ear is mainly responsible for sound detection and balance. In mammals, it consists of the bony labyrinth, a hollow cavity in the temporal bone of the skull with a system of passages comprising two main functional parts:
In a laboratory setting, HIV has been kept alive for as long as 15 days after the body fluid has dried, but this was controlled at a stable temperature and humidity that would be nearly impossible to reproduce in the natural world.
1 Survival depends on which body fluid it is in, volume of the body fluid, concentration of the virus within it, temperature, acidity, and exposure to sunlight and humidity. 2  HIV transmission has not been reported as a consequence of contact with spillages of blood, semen or other body fluids. Sewage is highly unlikely to pose a risk because infectious HIV has never been isolated from faeces or urine. 2  However, research by Thames Water has shown that HIV can survive for several days in sewage in the laboratory. 3  HIV does not survive as long as other viruses in sea water.