thorax , the part of an animal ’s body between its head and its midsection. In vertebrates (fishes, amphibians, reptiles, birds, and mammals), the thorax is the chest, with the chest being that part of the body between the neck and the abdomen. The vertebrate thorax contains the chief organs of respiration and circulation —namely, the lungs, some air passages, the heart, and the largest blood vessels (see thoracic cavity). Below, it is bounded by the diaphragm. The bony framework is ... Thorax (overview) The thorax is the superior part of the trunk extending between the neck and the abdomen. It consists of several components: Thoracic wall Several cavities Nerves, blood vessels, lymphatics Internal organs Breasts Thoracic wall The thoracic wall consists mainly of muscles and bones that form the thoracic cage. The thorax , commonly known as the chest, is the upper part of the torso that houses and protects vital organs such as the heart and lungs. It is a bony framework formed by the thoracic vertebrae, ribs, costal cartilages, and sternum, enclosing the thoracic cavity. [6] The thorax serves as a structural and protective unit while providing attachment for muscles of respiration and the upper limbs. The Thorax is an irregularly shaped cylinder with a narrow opening, called as superior thoracic aperture; and inferiorly it is a relatively large opening called as inferior thoracic aperture.
