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Lecture 38

Anatomy and Cell Biology 3319 Lecture 38: Respiratory Tract
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by OneClass566036 , Fall 2017
14 Pages
95 Views
Fall 2017

Department
Anatomy and Cell Biology
Course Code
Anatomy and Cell Biology 3319
Professor
Michele Barbeau
Lecture
38

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March 6th, 2018
Anatomy 3319
Trachea, Plurae, Lungs:
The Thoracic Cavity:
Mediastnum: heart, trachea, esophagus and other vessels
Bordered by the diaphragm – the base of the lung is resting on the diaphragm
Apex of the lung is just posterior to the first rib
Ribs are normally just against the lungs
Cardiac notch: in the LEFT lung and as a result the left lung is slightly smaller
The Trachea:
In the mediastinum:
16-20 C shaped hyaline cartilage rings so it does not deflate when there is no air
C shaped since esophagus is behind and need space for it to expand when swallowing
Trachealis muscle will contract and accelerate air out
Carina: last bit of hyaline cartilage, split into the bronchi
Internal Structures of the Trachea:
Inside of the carina
Trachealis
Hyaline cartilage on the outside of the trachea
Mucous help trap bacteria, particles, etc., Cilia beat to help propel up and out
(mucociliary escalator)
Anatomical Relationships:
Larynx à trachea
Just posterior is the esophagus
Anterior is the brachiocephalic arteries and veins
Clavicle and ribs
Tracheostomy:
In a hospital setting: slight incision between tracheal rings, insert a tube so that the external air
can bypass and keep someone breathing
Primary Brochi:
Around the sternal angle – at the base of the
manubrium
Through the mediastinum and branch into the
primary bronchi
More likely to get lodged in the right
bronchus since larger and at more of a vertical
angle
o Larger since the right lung lobe is
larger
Still hyaline cartilage, mucous, cilia
o Further in bronchi, some of these
features absent

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Description
th March 6 , 2018 Anatomy 3319 Trachea, Plurae, Lungs: The Thoracic Cavity: Mediastnum: heart, trachea, esophagus and other vessels Bordered by the diaphragm the base of the lung is resting on the diaphragm Apex of the lung is just posterior to the first rib Ribs are normally just against the lungs Cardiac notch: in the LEFT lung and as a result the left lung is slightly smaller The Trachea: In the mediastinum: 16-20 C shaped hyaline cartilage rings so it does not deflate when there is no air C shaped since esophagus is behind and need space for it to expand when swallowing Trachealis muscle will contract and accelerate air out Carina: last bit of hyaline cartilage, split into the bronchi Internal Structures of the Trachea: Inside of the carina Trachealis Hyaline cartilage on the outside of the trachea Mucous help trap bacteria, particles, etc., Cilia beat to help propel up and out (mucociliary escalator) Anatomical Relationships: Larynx trachea Just posterior is the esophagus Anterior is the brachiocephalic arteries and veins Clavicle and ribs Tracheostomy: In a hospital setting: slight incision between tracheal rings, insert a tube so that the external air can bypass and keep someone breathing Primary Brochi: Around the sternal angle at the base of the manubrium Through the mediastinum and branch into the primary bronchi More likely to get lodged in the right bronchus since larger and at more of a vertical angle o Larger since the right lung lobe is larger Still hyaline cartilage, mucous, cilia o Further in bronchi, some of these features absent
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