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 diaphragm is the dome-shaped sheet of muscle and tendon that serves as the main muscle of respiration and plays a vital role in the breathing process. Also known as the thoracic diaphragm, it serves as an important anatomical landmark that separates the thorax, or chest, from the abdomen. The origins of the diaphragm are found along the lumbar vertebrae of the spine and the inferior border of the ribs and sternum.