Anatomy Lab: The Ventilatory System

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External Nares


Nasal Septum

Separates Nostrils

Nasal Cavity

Lined with mucous membrane, moistens air entering the respiratory system. Traps dust particles


3 Regions: Nasopharynx, Oropharynx, Laryngopharynx


Posterior to nasal cavity


Behind oral cavity


Superior to larynx most inferior


Voice Box, pitch

Thyroid Cartilage

Made of Hyaline cartilage, Shield Shaped, most prominent.

Cricoid Cartilage

Inferior to Thyroid Cartilage, also made of hyaline cartilage

Arytenoid Cartilage

Superior to Cricoid Cartilage, Posterior wall of larynx

Vocal Folds

Cartilages attach here


Most superior part of larynx, elastic cartilage


Covers larynx during swallowing


Wind pipe

Tracheal Cartilages

Keeps trachea open (c shaped)

Primary Bronchi

Enter lungs, division of trachea

Secondary/lobar bronchi

Division of primary bronchi


Two in humans

Right lung

Has 3 lobes (Superior, Middle, Inferior)

Left Lung

Has 2 Lobes (Superior and Inferior)

Cardiac Notch

Where the Heart sits in the left lung

Pleural Cavities

Where the lungs sit

Parietal Pleura

Outer membrane on chest cavity

Visceral Pleura

Membrane on lungs


Division of bronchi, small tubules, smooth muscle with blood capillaries


Air sacs in lungs, exchange O2 and CO2 with blood capillaries.

Respiratory Membrane

Oxygen moves across this membrane. Has Aleveolus and Capillary epithelium and the basement membrane between the two

Pulmonary Ventilation

Mechanical process of moving air in and out of the lungs.

Tidal Volume

Amount of air release during a normal exhale

Expiratory Reserve Volume

Max amount of air that you exhale after normal exhale

Vital Capacity

Total Volume of air that can be forcefully expelled after maximum

Inspiratory Reserve Volume


Residual Volume

Air left in the lungs after maximum exhalation

Minute Volume

Total amount of air inspired and expired in 1 min, normal breathing

Cardiopulmonary Resuscitation

Used on people suffering heart attack, drug OD etc. 100 times per minute chest compressions. 30 chest compressions: 2 ventilations

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