Changes

==Introduction==

==Introduction==

The histology of the '''bronchi''' is almost identical to that of the [[Trachea - Anatomy & Physiology|trachea]]. The lumen of the bronchus is lined by a '''pseudostratified epithelium''', including goblet cells and serous cells. Beneath the narrow layer of connective tissue under the epithelium lie well-developed spiral bands of [[Muscles - Anatomy & Physiology#Smooth Muscle|smooth muscle]].

The histology of the '''bronchi''' is almost identical to that of the [[Trachea - Anatomy & Physiology|trachea]]. The lumen of the bronchus is lined by a '''pseudostratified epithelium''', including goblet cells and serous cells. Beneath the narrow layer of connective tissue under the epithelium lie well-developed spiral bands of [[Muscles - Anatomy & Physiology#Smooth Muscle|smooth muscle]].

The '''Bronchioles''' have no [[Bones and Cartilage - Anatomy & Physiology#Types of Cartilage|cartilage]] rings but have well developed [[Muscles - Anatomy & Physiology|muscular]] walls to enclose the lumen. The epithelium is reduced to cuboidal, and in the normal animal it contains no mucus secreting glands. There are many [[Lymph Nodes - Anatomy & Physiology|lymphoid]] nodules beneath the epithelial layer.

The '''Bronchioles''' have no [[Cartilage - Anatomy & Physiology#Types of Cartilage|cartilage]] rings but have well developed [[Muscles - Anatomy & Physiology|muscular]] walls to enclose the lumen. The epithelium is reduced to cuboidal, and in the normal animal it contains no mucus secreting glands. There are many [[Lymph Nodes - Anatomy & Physiology|lymphoid]] nodules beneath the epithelial layer.

The '''respiratory bronchioles''' have few alveoli scattered along the length, at the entrance of which is ''simple squamous'' epithelium, and bronchial [[Muscles - Anatomy & Physiology#Smooth Muscle|smooth muscle]] bundles.

The '''respiratory bronchioles''' have few alveoli scattered along the length, at the entrance of which is ''simple squamous'' epithelium, and bronchial [[Muscles - Anatomy & Physiology#Smooth Muscle|smooth muscle]] bundles.

==Links==

==Links==

'''Click here for information on [[Bronchi and Bronchioles - Pathology|pathology of bronchi and bronchioles]]'''

'''Click here for information on [[:Category:Bronchi and Bronchioles - Pathology|pathology of bronchi and bronchioles]]'''

==References==

==References==

{{citation|initiallast = Budras|initialfirst = K.D|2last = McCarthy|2first = P.H|3last = Fricke|3first = W|finallast = Richter|finalfirst = R|year = 2002|title = Anatomy of the Dog|ed =4th|city = Hannover|pub = Schlutersche GmbH & Co. KG, Verlag und Druckerei}}

{{citation|initiallast = Budras|initialfirst = K.D|2last = McCarthy|2first = P.H|3last = Fricke|3first = W|finallast = Richter|finalfirst = R|year = 2002|title = Anatomy of the Dog|ed =4th|city = Hannover|pub = Schlutersche GmbH & Co. KG, Verlag und Druckerei}}

[[Category:Respiratory System - Anatomy & Physiology]]

[[Category:Respiratory System - Anatomy & Physiology]]

[[Category:A&P Done]]

[[Category:A&P Done]]