Rinnaõõne

Rinnaõõne refers to the thoracic cavity, the space within the chest that contains the heart and lungs. It is enclosed by the rib cage, the sternum (breastbone) at the front, and the thoracic vertebrae at the back. The diaphragm forms the floor of the thoracic cavity. This space is crucial for respiration, as the lungs expand and contract within it during breathing. The rhythmic contractions of the diaphragm and intercostal muscles alter the volume of the rinnaõõne, drawing air into and expelling it from the lungs. The heart is also located within the rinnaõõne, protected by the rib cage and situated slightly to the left of the midline. The major blood vessels connected to the heart, such as the aorta and pulmonary artery, also reside within this cavity. The pleural membranes, a thin lining, surround each lung and line the inner surface of the rib cage, reducing friction during breathing. The sternum, ribs, and vertebral column provide vital protection to these delicate organs from external trauma. Conditions affecting the rinnaõõne can impact both the respiratory and circulatory systems.