第二节 Section
肺 Lung
（一）肺的位置 Position (a) of the lung
肺位于胸腔内，纵隔两侧，左、右各一。 Located in intrathoracic lung, mediastinum sides, left and right of each one.
（二）肺的形态 Form (B) lungs
右肺粗短，左肺狭长。 Stubby right lung, left lung narrow. 每侧肺似半个锥体形，可归纳为一尖、一底、两面、三缘。 Cone shaped like a half on each side of the lungs, can be summarized as a tip, a bottom, two, three edge.
1． 1. 肺尖 Apex
肺的上端钝圆，突入颈根部。 Upper lung obtuse, broke into the root of the neck. 其体表投影在锁骨内侧段以上2~3cm。 Its surface projection of the medial clavicle in the above paragraph 2 ~ 3cm.
2． 2. 肺底 Lung bases
向下与膈顶相贴。 Down with the diaphragm attached to the top phase.
3． 3. 两面 Both sides
(1)外侧面：与肋和肋间肌相邻，又称肋面。 (1) outer side: and the adjacent ribs and intercostal muscles, also known as the rib surface.
(2)内侧面；与纵隔相贴，又称纵隔面。 (2) the inner side; and mediastinal paste, known as mediastinal surface. 中央微凹称肺门，是主支气管、肺动脉、肺静脉、神经、淋巴管等出入的部位。 Central dimpled said hilar, is out of the site of the main bronchus, pulmonary artery, pulmonary vein, nerve, lymphatic and so on. 上述结构被结缔组织膜包绕称肺根。 These structures are called connective tissue membrane surrounding the lung roots.
4． 4. 三缘 Three edge
后缘钝圆，前缘和下缘锐利。 Blunt trailing edge, the leading edge and the lower edge sharp. 左肺前缘有心切迹。 Determined to notch the leading edge of the left lung.
肺的形态 Lung morphology
左肺狭长右粗短 Left lung narrow right stubby
三缘两面一底尖 Three sides of a bottom edge tip
前下两缘都锐利 Before the next two edges are sharp
只有后缘较钝圆 Only relatively blunt trailing edge
外面邻接肋和肌 Outside the adjacent ribs and muscle
内面肺门较凹陷 Depression compared with the inner surface of the hilar
锁骨内上二三厘 Supraclavicular within two Sanli
颈根深部有肺尖 Deep neck Ministry has apex
（三）肺内支气管 (C) pulmonary bronchial
主支气管入肺后依次分为肺叶支气管、肺段支气管、小支气管、细支气管、终末支气管。 After the turn into the main bronchus lung lobe bronchus, lung segmental bronchi, small bronchi, bronchioles, terminal bronchi. 恰似一棵倒立的大树，也称支气管树。 Is like an inverted tree, also known as the bronchial tree.
肺内支气管 Lung bronchi
肺叶肺段小细终 Lobar lung segment small thin end
一棵大树倒栽葱 A tree headlong