hi let's talk about the surface anatomy of the lungs in this video i'll describe the right
and left lungs surface anatomy including fissures lobes apices bases hilah we'll also differentiate
between the left and the right lungs so let's get started with surfaces there are three major
surfaces of the lungs there are costal surfaces which are everything here in blue the costal
surfaces are going to face the costal pluri the which line the ribs in the intercostal spaces
there's also the mediastinal surface the mediastinal surface is everything here in yellow
and it faces the mediastinum and the mediastinal pleura it's this surface which hosts the hila
of the lungs and the contents of the hila are the roots of the lungs
and then the third surface is the diaphragmatic surface also known as the base of the lung
the diaphragmatic surface is everything here in green which will face the diaphragmatic pleura as
well as the diaphragm and then finally the the most superior portion of the lung is known as
the apex so the apices of the lungs will face the cervical blurry up towards the roots of the neck
in terms of gross features lungs consist of lobes typically the right lung is going to have three
lobes a superior or upper lobe a middle and an inferior or lower lobe whereas the left lung
typically only has two lobes a superior and an inferior so there's no middle lobe for the left
lung these lobes are separated by fissures and it's into these fissures that the visceral pluri
are going to dive deep to help separate these lobes there is an oblique fissure the oblique
fissure separates the superior from the inferior on the right side as well as the middle from the
inferior on the left lung the oblique fissure simply separates the superior from inferior
and on the right lung there's also a horizontal fissure which separates the superior lobe
from the middle so that middle lobe is flanked
by both horizontal and oblique fissures on either side of it
again there are apices at the top that are going to be of the superior lobes there's going to be
bases or diaphragmatic surfaces on the bottoms which are going to largely be associated with
the inferior lobe but on the right side may partially be associated with that middle lobe
the mediastinal surface is what hosts the hilum so the hilum of an organ
is where the neurovasculature may enter and leave we can see that here
the hilum is going to have many different contents the contents are known as the root of the lung
so in this case the major contents are going to include the primary bronchi
which we can see here in yellow the pulmonary arteries which i can see here in blue
and then finally the pulmonary veins which i can see here in red
in addition to these features the left lung also has a cardiac notch which we can see here
that is going to be that space to accommodate the apex of the heart
and the inferior portion of that cardiac notch and we can see that a little better here
supplied by the superior lobe has a lingula a lingula
so we've uh discussed the various surfaces and gross features of the lungs as well as the hila
and the contents of the hilah the roots of the lung which include primary bronchi
pulmonary arteries and pulmonary veins this is your summary slide thank you for your time