I. Morphology of the lungs

The shape of the lungs is variable, depending on the amount of inflation and expansion of the chest, which is usually conical. Depending on the location of each lung, it can be divided into the apical, the base of the lung (diaphragmatic surface), the rib and mediastinal surfaces and the anterior, posterior and inferior margins of the confluence of the three surfaces.

Two, the location of the lungs

The human lungs are located in the thoracic cavity, relying on the roots of the lungs and pulmonary ligaments suspended on both sides of the mediastinum. There is a lung on each side, and the surface of the lungs is covered with the pleura and the dirty layer of the septum, and polygonal lung lobules are visible. The color of the lungs varies according to age and occupation. Children are light red. Adults are dark gray, mixed with many black spots, due to prolonged contact with the outside world, which absorbs and deposits a great deal of haze. The lungs are soft and spongy because they contain air.

Third, the lobes of the lungs

The left lung is divided into upper and lower lobes by oblique fissures. The right lung is divided into upper, middle and lower lobes by oblique and horizontal fissures. The body projection of the oblique fissure of the lung corresponds to the oblique line from the spinous process of the third thoracic vertebra to the midclavicular line where it intersects the sixth rib. The somatic projection of the horizontal fissure surface of the right lung corresponds to the level of the right fourth thoracic rib articulation to the midaxillary line where it intersects the oblique fissure. The lower edge of the lung extends into the gap between the diaphragm and the chest wall; this gap is sharp and the posterior edge of the lung is rounded.

Expanded Information

The methods and precautions to protect the lungs are as follows:

1. Do aerobic exercise and avoid serious pollution.

2. Go less to crowded and dirty places to avoid cross-breathing.

3, don't smoke and drink alcohol, as long as it is irritating, it will damage human organs.

4, eat less of all kinds of supplements, is medicine has three poisons.

Baidu Encyclopedia - Lungs

Baidu Encyclopedia - Lungs