anatomy of the trachea and broncheal tree
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Anatomy of the trachea and broncheal tree. By; Dr. Eman Abdelghany Assistant Prof. of Anatomy & Embryology Al-Qassim university. Anatomy of the trachea. Length : 10 cm Width : 2 cm Begins: as a continuation of larynx, at lower border of cricoid cartilage (C6).

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anatomy of the trachea and broncheal tree

Anatomy of the trachea and broncheal tree

By;

Dr. Eman Abdelghany

Assistant Prof. of Anatomy & Embryology

Al-Qassim university

anatomy of the trachea
Anatomy of the trachea

Length:10 cm Width: 2 cm

Begins: as a continuation of larynx, at lower border of cricoid cartilage (C6).

Ends:by dividing into two main bronchi opposite the disc between 4th & 5th thoracic vertebrae. It lies in midline of neck in front of esophagus and behind thyroid gland. Upper1\2 in the neck called cervical part, and Lower 1\2 in the thorax(in superior mediastinum) called thoracic part, It shows slight deviation to the right.

Carina

Y shaped

last ring

trachea
Trachea

Trachialis

muscle

anatomy of the trachea continue
Anatomy of the trachea continue,

15-20 incomplete cartilaginous rings (C –shaped)-completed by trachealis muscle posteriorly.

Becomes intra-thoracic at 6th cartilaginous ring

The last tracheal ring is Y- shaped called the carina. The Carinais the site of branching to left and right primary bronchi , at the tracheal bifurcation.

The posterior wall is trachealis muscle which, allows esophageal expansion during deglutition

bronchial tree
Bronchial Tree

A highly branched system , The air-conducting passages

originate from the left and right primary bronchi.

Progressively branch into narrower tubes as they diverge throughout the lungs before terminating into terminal bronchioles.

Primary bronchi.

-Incomplete rings of hyaline cartilage ensure that they remain open.Theyenter the hilum of each lung.

Right primary bronchus is, shorter, wider, and more vertically oriented than the left primary bronchus.

Foreign particles are more likely to lodge in the right primary bronchus

bronchial tree continue
Bronchial Tree continue,

Secondary bronchi (or lobar bronchi)

  • Branch of primary bronchus
  • left lung:

2 lobes

2 secondary bronchi

  • Right lung

3 lobes

3 secondary bronchi.

Tertiary bronchi (or segmental bronchi)

  • Branch of secondary bronchi
  • left lung is supplied by 8 to 10 tertiary bronchi.
  • right lung is supplied by 10 tertiary bronchi
  • supply a part of the lung called a bronchopulmonary segment.
broncho pulmonary segments
Broncho pulmonary segments:

-well defined sectors of lung.

  • Each is aerated by segmental bronchus , separate branch of pulmonary artery.veins are intersegmental.

-each segment is surrounded by connective tissue and forms a separate respiratory unit .

-shape: pyramidal with apex at the hilum and the base towards surface of lung.

slide9

+ Medial basal

segment

10 segments

slide10

Arise by common stem

Med. Basal ,small. May arise by common stem with ant. basal

slide11

Nasal Cavity

Throat

(pharynx)

Nose

Mouth

Windpipe (Trachea)

Bronchus

Left lungs

Bronchiole

Ribs

Alveolus

Diaphragm

the end

The End!

The End

So Take a Deep Breath and

Go Home

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