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Embryology | Development of the Respiratory System

Ninja Nerd

722,360 views

📚 Premium Notes & Illustrations for Respiratory System Development: https://www.ninjanerd.org/lecture/dev...

Ninja Nerds!
In this embryology lecture, Professor Zach Murphy walks you through the development of the respiratory system, from the initial formation of the laryngotracheal diverticulum to the maturation of the alveoli. This lecture highlights how a complex and highly organized airway system forms from a simple outpouching of the foregut.

We begin by examining how the respiratory diverticulum buds from the ventral wall of the foregut, and how the tracheoesophageal septum separates it from the esophagus. Zach then explains the sequential branching of the bronchial tree, from primary bronchi to terminal bronchioles, emphasizing the timing and stages of lung development—pseudoglandular, canalicular, saccular, and alveolar phases.

The lecture also reviews the formation of the pleural cavities, pulmonary vasculature, and surfactant production by type II pneumocytes.

Correction:
At 27:31 in this lecture, there is an error regarding the number of tertiary (segmental) bronchi. The correct anatomy is:
10 tertiary bronchi on the right
8-10 tertiary bronchi on the left

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20 Comments

@amritbhakta8498 1 year ago

why does this guy have every single video for every single topic i happen to need, the legend himself

@conversationswithblessings1868 1 year ago

Bro is a gift to mankind!😭

@EvansAbabio-s8d 2 years ago

If only Ninja Nerd has the slightest idea how helpful he's been to medical students...
I take my heart off to you Prof. God bless you❤

@vickyotieno4525 5 years ago

You make me enjoy when you say" you know what these guys do" " that's cool, isn't it" the best lecturer I have ever seen

@Afghan31 5 years ago

Normal teachers: I'm not very good at drawing.

Zach: Hold my pens.

@joyiwomi4440 3 years ago

From Nigeria,I say a big thank you 😊.

@alih6953 5 years ago (edited)

The best diagrams and the best explanations. You sir are a legend! The Tom Brady of Medicine!

@klm9791 5 years ago

You said "Beautiful" more number of times than the number of breaths performed by my Respiratory System during this tutorail!!

@tihammaxwell9285 6 days ago

You the GOAT

@naritastudy6739 5 years ago

for the first time in med school I understand embryology, thank you so much

@reinelalcides76 5 years ago

I think is you teach excellent lectures but I see you have 846 views and only 151 likes and it is not fair because your team done a great job, excellent I mean, also you are teaching a free knowledge which is very uncommon now days. I am neurosurgeon and I love to see your high quality lecture and I would like all your viewers at least push the like button as a way to thank your efforts. Congratulation for your job.

@Brionick 5 years ago

18:26 the way he says hind gut 😂😂

@mahnoorsajid5972 1 year ago

There are 8 tertiary bronchi on left side while 10 on right 27:38

@MUSAMANSARAY-j7t 3 months ago

I opened my laptop to study this topic. I felt stupid of myself. Watching this video makes everything cool 😊

@thatsmymassage4609 5 years ago

you got no idea how much guidance you give us and will never be able to describe how much students appreciate it.
THANKS

@ildiavolonellecolline 5 years ago

Me: jesus that surfactant stuff it's cool
Zach: so the last stage is probably the coolest part
Me: you (still) have my attention now

@lutaayaedward710 5 months ago

Thank you so much for this. I’ve been reading Neonatal and Pediatric Respiratory Care, but I struggled to grasp the stages of lung development. You’ve simplified them in a way that finally makes sense to me. I’ve also been explaining respiratory distress syndrome (RDS) in preterm and low birthweight neonates, and now I can do so with a much deeper understanding. I truly appreciate the clarity you’ve given me
thank you once again.