Lungs In Detail

Question 1

Lungs

Answer 1

-respiratory organ in thoracic cavity
-each lungs invaginates pleural cavity
-both lungs separated by mediastinum
-spongy in texture
-brown /Grey at younger and mottled later due to the presence of carbon particles
-right lung 700 g ,50 to 100g heavier than left lung

Question 2

Borders of lung

Answer 2

Anterior
-very thin
-shorter than Posterior
-right lung ,it is vertical
-left lung ,cardiac notch below 4th costal cartilage
Heart and pericardium not covered

Posterior
-thick and ill defined
-extend from C7 to T10

Inferior
-separate base from costal and medial surfaces

Question 3

Surfaces of lungs

Answer 3

Costal
-large, convex
-contact with costal pleura and overlying thoracic wall

Medial
-2 types ,Posterior/ vertebral -intervertebral disc, vertebral bodies, Posterior intercostal vessels
Inferior/ mediastinal -mediastinal septum, cardiac impression,hilum. Etc

Question 4

Roots of lung

Answer 4

-short
-broad pedicle which connects medial surfaces to mediastinum
-opposite to the bodies of T5,T6,T7
-formed by structures which either come out or enter lungs at hilum

Question 5

Contents of roots of lungs

Answer 5

1,principle bronchus on left side,eparterial and hyparterial bronchi on right side
2,1 pulmonary artery
3,2 pulmonary veins,superior and inferior
4.bronchial arteries, 1 on right and 2 on left
5,bronchial veins
6,anterior and Posterior pulmonary plexus of nerves
7,lymphatic of lungs
8,bronchopulmonary lymph node
9,areolar tissue

Question 6

Arrangement of structure in roots of lungs

Answer 6

From backwards
-superior pulmonary vein-pulmonary artery-bronchus

From downward
Right side
-eparterial bronchus-pulmonary artery-hyparterial bronchus-inferior pulmonary vein

Left side
Pulmonary artery-bronchus-pulmonary vein