Ⅴ. Lung: Position: located in the thoracic cavity, both sides of the mediastinum, above the diaphragm

an apex External features: a base 2 surfaces— mediastinal and costal surfaces 3 borders– anterior border, inferior border, posterior border

Fissures and lobes of the lungs: left lung – 2 lobes ( by oblique fissure) superior lobe (lingula) inferior lobe right lung – 3 lobes (by oblique and horizontal fissures): superior lobe middle lobe,

Hilum of lungs (medial view of the lungs) It is the center part of mediastinal surface. The arrangement of main structures as follows: from anterior to posterior--- pulmonary v., pulmonary a., main bronchus (both sides) from superior to inferior--- right lung– bronchus of sup. lobe, left lung– pulmonary a., pulmonary a., main bronchus, bronchus of inf. lobe, pulmonary v. pulmonary v.

The structures of the lung: two parts --- bronchial tree: principal bronchus--- lobar bronchi---segmental bronchi--- bronchioles--- terminal bronchioles --- alveoli of the lung:

The Segments of the lung: bronchopulmonary segments

Ⅵ. The Pleura and pleural cavities: The definition The Parts: Visceral pleura Parietal pleura---- Cupula Costal pleura Mediastinal pleura Diaphragmatic pleura The pleural cavity and pleural recess : a potential space, contains a few of serous fluid; 2 pleural cavities are separated from each other by the mediastinum; They are negative pressure (to the atmospheric pressure). costodiaphragmatic recess

Ⅴ. Mediastinum: The definition The divisions: 4 parts 3 parts The containts: from the left side the right site right view Left view