Respiratory System

Respiratory System

Anatomy

Thorax

Pharynx

Nasal cavity

Bronchi

Alveoli

Alveolar duct

Bronchioles

Tertiary bronchi

Secondary bronchi

Principle bronchi

Trachea

Trachealis muscle

Annular ligament

permit flexibility

Tracheal cartilage

resist collapse

provide rigidity

Larynx

Functions

Protect the airway

Organ of phonation

Regulate size of airways

Arytenoid cartilage

Cricoid cartilage

Thyroid cartilage

Epiglottis

Lungs

Comprises

base

cranial side of diaphragm

apex

close to thoracic inlet

Function

Retain volume of air

Nostrils

external openings of respiratory tract

Physiology

Pulmonary ventilation

Gas transport

Gas exchange