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.
Animals without it, such as flatworms, are called acoelomates. In between there are some animals called pseudocoelomates, which possess a false coelom, which is an unlined or partially lined body cavity between the gut and body wall.A coelom is defined as a cavity that separates the gut from the body wall. coelom (pronounced seal-um) is a fluid-filled body cavity found in most animals. It is located in the mesoderm, the middle germ layer only found in triploblastic (three-layered) organisms.