Around a third of all heat lost from a poorly insulated home escapes through the walls, which means installing cavity-wall insulation is often one of the most cost-effective measures you can take to ...

Just like other parts ... tympanic membrane (eardrum) is the border between the outer and middle ear. It is composed of a membrane attached by fibrous cartilage to the surrounding bone. The inner ...

These parts attach to muscles involved in chewing and other functions ... a cavity in the base of the skull. A thinner portion goes over the tympanic cavity, the hole surrounding the middle ear bones.