This video presents an easily understandable explanation of the embryological development of diaphragm and pleural cavity. With fascinating hand drawn diagrams and simplified explanation, this video clears the concept diligently. Timeline: 00:00 introduction 02:38 development of the diaphragm and pleural cavity 07:06 separation of pleural and pericardial cavity 09:40 pericardial peritoneal canal 10:42 expansion of lungs 11:29 week 4 12:50 summary of the development 13:35 summary of the phrenic nerve