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.
The thorax is the main engine room of the insect. It like the Abdomen is built up of a series of concave upper and convex lower integumental plates, in the Thorax they are known as the 'Nota' (singular notum) and 'Pleura' (singular pleuron) the whole being held together by a tough yet stretchable membrane.