1. The Respiratory System 2.

2. The respiratory system consists of an airway and lungs
The airway conducts air into the lungs
Breath of air passes in sequence:
Nostrils,
nasal cavities,
pharynx,
larynx,
trachea,
bronchi,
bronchioles,
and alveoli

3. The lower respiratory tract
Trachea = windpipe
Main bronchi
Lobar bronchi
Lungs
Bronchioles
- Alveolar sacs
- Alveoli

4. The trachea = windpipe Tube: inner 20-25 mm in diameter
10-16 cm in length
15 – 20 incomplete C-shaped cartilaginous rings
trachea
The cartilaginous rings are incomplete because this allows the trachea to collapse slightly to allow food to pass down the esophagus
Posterior of trachea: smooth muscle and connective tissue

6. Great horned owl – Amerikai uhu

7. Air passageway Trachea  two main bronchi (Left + Right)
The right main bronchus is wider, shorter, and more vertical than the left main bronchus
L main bronchus  two lobar bronchi
R main bronchus  three lobar bronchi
Lobar bronchi  primary bronchioles
primary bronchioles  alveolar ducts
alveolar ducts  alveolar sacs  alveoli

8. 1 2 3 4 5 6 6 1: L main bronchus 2: R main bronchus
3: two lobar bronchi
4: three lobar bronchi
5: primary bronchioles
alveolar ducts
6: alveolar sacs
alveoli 1 2 3 4 5 6 6

9. The Lung Every time you breath in and out your lungs are hard at work
Lungs are surrounded by the rib cage, on sit on diaphragm
The respiratory zone is the site of gas exchange with blood
Color: pink, after years becomes grey /

10. Parts Base: bottom Apex: tip
Hilus: place where vessels, bronchi are step in and out the lung

11. The Lung The human lungs are the organs of respiration in humans
Humans have two lungs, with the left being divided into two lobes and the right into three lobes
Together, the lungs contain approximately 1500 miles (2,400 km) of airways and 300 to 500 million alveoli, having a total surface area of about 70 m2 in adults (the same area as a tennis court)

14. The pleura
The lungs are surrounded by the pleurae, a serous membrane which folds back upon itself to form a two-layered, membrane structure.
The thin space between the two pleural layers is known as the pleural space; it normally contains a small amount of pleural fluid.
The outer pleura (parietal pleura) is attached to the chest wall.
The inner pleura (visceral pleura) covers the lungs and adjoining structures, i.e. blood vessels, bronchi and nerves.
Serous - savas