Lungs Flashcards
parts of the parietal pleura
Costal part
– Diaphragmatic part
– Mediastinal part
– Cervical pleura
where does the mediastinal pleura reflect off mediastinum
TV to TVII
sleeve like
covering forming root of the
lung
root of lung join
hilum of the lung
mediastinal pleura continuous with visceral pleura
pleural recesses anterioraly of ribs
8th rib anteriorly
Midclavicular line
6th rib anteriorly
Midclavicular line
function of thoracic cavity
keep thoracic pressure on the negative side
pleural recesses laterally of ribs
10th rib laterally- Midaxillary line
8th rib laterally- Midaxillary line
pleural recesses posteriorly of ribs
12th rib/TXII posteriorly
10th rib/TX posteriorly
pneumothorax
lungs collapse and cannot inflate
location of oblique fissure and function
transverse line on thoracic 4
separate lower lobe and upper lobe
location of horizontal fissure
only in right lung
from 4th costal cartilage to 6th costal cartilage
root of the lung
back of the lungs that shows the pulmonary veins, pulmonary arteries, bronchus etc
bronchopulmonary segment
Area of lung supplied by a segmental bronchus
& branch of pulmonary artery
lungs are divided by lobes - lobes subdivided by BP segments
• Share tributaries of pulmonary vein & lymphatics
when will bronchopulmonary segment collapse
cystic fibrosis
each BP segment has
Has its own bronchus
Has its own segmental artery
Pulmonary veins run between segments
bronchi further divide into
bronchioles
main bronchus turn to
lobar branches
difference in bronchi and bronchioles
– Bronchi have cartilage in walls
– Bronchioli do not
2 sets of vessels in lungs
pulmonary and bronchioles
pulmonary arteries
Supply the alveoli with deoxygenated
blood
pulmonary veins
Two pulmonary veins exit each lung
Carry oxygenated blood to the heart
bronchial arteries
Supply most of bronchial tree & visceral pleura
bronchial veins
Drain most of bronchial tree & visceral pleura
nerve supply of lungs from what plexus
autonomic sympathetic and parasympathetic
from cardiac plexus to form pulmonary plexus at hilum
parasympathetic nerve supply of lungs
Vagus nerve
function of vagus nerve -parasympathetic
Bronchoconstriction
Smooth muscle in walls of conducting pathways
Vasodilation
Cough reflex
function of SNS on lungs
Bronchodilation
Vasoconstriction
(NB – medications)
normal volume changes in expiration
– Passive
– Intercostal muscles relax & ribcage falls
– Diaphragm recoils & elevates
forced volume changes of expiration
Active
– Internal intercostals contract
– Abdominal wall muscles contract:
elevates diaphragm
