Respiratory System

Gas exchange

Gas transport

Pulmonary ventilation

external openings of respiratory tract

Lungs

Function

Retain volume of air

Comprises

apex

close to thoracic inlet

base

cranial side of diaphragm

Comprises

Epiglottis

Thyroid cartilage

Cricoid cartilage

Arytenoid cartilage

Functions

Regulate size of airways

Organ of phonation

Protect the airway

Trachea

Comprises

Tracheal cartilage

provide rigidity

resist collapse

Annular ligament

permit flexibility

Trachealis muscle

Bronchi

Comprises

Principle bronchi

Secondary bronchi

Tertiary bronchi

Bronchioles

Alveolar duct

Alveoli

Nasal cavity

Pharynx

Thorax