Definition of litre: A metric unit of capacity, formerly defined as the volume of one kilogram of water under standard conditions, now equal to 1,000 cubic centimetres (about 1.75 pints): 5 cc is about 5 ml. For details see wWkipedia: Litre and Metre. Views.
The thorax is the midsection of the insect body. It holds the head, legs, wings and abdomen. It is also called mesosoma in other arthropods. It is formed by the prothorax, mesothorax and metathorax and comprises the scutellum; the cervix, a membrane that separates the head from the thorax; and the pleuron, a lateral sclerite of the thorax.
Therefore, the thorax can be defined as consisting of the thoracic cavity, its contents including the primary organs of the respiratory and cardiovascular systems, and the wall that surrounds it. It is the part of the trunk between the neck and abdomen. The thorax is composed of a ventral and a dorsal surface.