- Figure shows the limit of full expiration and inspiration of the male, side view
- Section of the head and throat locating the organs of speech and song, including the upper resonators
The important maxillary sinus cannot well be shown. It is found within the maxillary bone (cheek bone). The inner end of the line marked Nasal cavity locates it. - The diaphragm is in form like an inverted bowl
It forms the floor of the thorax (chest) and the roof of the abdomen. It is attached by a strong tendon to the spinal column behind, and to the walls of the thorax at its lowest part, which is below the ribs. In front its attachment is to the cartilage at the pit of the stomach. It also connects with the transverse abdominal muscle. The diaphragm being convex, in inspiration the contraction of its fibres flattens it downward and presses down the organs in the abdomen, thus increasing the depth of the thorax. Expiration depends wholly on other muscles. - Human skeleton and Body outline
Human skeleton and Body outline