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6179252 respi anatomy

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RESPIRATORY SYSTEM
I. FUNCTION
To supply the body with oxygen and dispose carbon dioxide
It involves at least 3 distinct process:
1. Pulmonary Ventilation
Inflow and outflow of air between the atmosphere and alveoli of the
lungs
2. External Respiration
Diffusion of oxygen and carbon dioxide between the alveoli and
pulmonary capillaries
3. Internal Respiration
Transport of oxygen and carbon dioxide via the blood to and from
the tissue
II. FUNCTIONAL ANATOMY OF THE RESPIRATORY SYSTEM
A. Conducting Zone
Also called as “dead space” because there is no gas exchange in
these zones
Respiratory passages extending from nose to the terminal bronchioles
B. Respiratory Zone
Actual site of gas exchange
Composed of the respiratory bronchioles, alveolar ducts, and alveoli
i. Conducting Zone Structures
I. Upper resp tract
A. Filtering of air
B. Warming and moisruring
C. Humidification
A. Nose
made up of framework of cartilage
nostril septum
Kessel-bach plexus: anastomosis

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capillaries
B. Pharynx
muscular passageway for both air and food
1. Orophyarynx
2. Nasopharynx
3. Laryngophyarynx
C. Larynx
voicebox
1. For phonation
2. Coughing reflex
3. Opening of larynx: glottis
it opens to allow passage of air
closes to allow food passage
II. Lower resp tract
For gas exchange
A. Trachea (windpipe)
consists of cartilaginous rings
permanent artificial airway
B. Bronchii
Right bronchus
Left bronchus
Diameter
Wider
Narrower
Length
Shorter
Longer
Direction
More vertical
Oblique
ii. Respiratory Zone Structures
a. Respiratory Bronchioles
b. Alveolar ducts
c. Alveolar sac
d. Alveoli actual site of gas exchange
The respiratory membrane is composed of several cell types
A. Type I pneumocytes

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RESPIRATORY SYSTEM I. FUNCTION • To supply the body with oxygen and dispose carbon dioxide • It involves at least 3 distinct process: 1. Pulmonary Ventilation ▪ Inflow and outflow of air between the atmosphere and alveoli of the lungs 2. External Respiration ▪ Diffusion of oxygen and carbon dioxide between the alveoli and pulmonary capillaries 3. Internal Respiration ▪ Transport of oxygen and carbon dioxide via the blood to and from the tissue II. FUNCTIONAL ANATOMY OF THE RESPIRATORY SYSTEM A. Conducting Zone • Also called as “dead space” because there is no gas exchange in these zones • Respiratory passages extending from nose to the terminal bronchioles B. Respiratory Zone i. • Actual site of gas exchange • Composed of the respiratory bronchioles, alveolar ducts, and alveoli Conducting Zone Structures I. Upper resp tract A. Filtering of air B. Warming and moisruring C. Humidification A. Nose ➢ made up of framework of cartilage ➢ nostril septum ➢ Kessel-bach plexus: anastomosis 1 ➢ capillaries B. Pharynx ➢ muscular passageway for both air and food 1. Orophyarynx 2. Nasopharynx 3. Laryngophyarynx C. Larynx ➢ voicebox 1. For phonation 2. Coughing reflex 3. Opening of larynx: glottis ➢ it opens to allow passage of air ➢ closes to allow food passage II. Lower resp tract ➢ For gas exchange A. Trachea (windpipe) ➢ consists of cartilaginous rings ➢ permanent artificial airway B. Bronchii Right bronchus Left bro ...
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