Respiratory System

Nose-The most external organ, air is inhaled and exhaled through 

nose, has different mechanisms for cleaning and condensing the inhaled air

• Larynx-Also known as sound box, formed of cartilages, connects the tracheo to the 

laryngopharynx

• Trachea-Tubular structure with about 1 inch diameter, composed of 15-20 C shaped 

cartilages that keep it dilated

• Bronchi-Left and Right dividions of trachea, enters the lungs and divide into secondary 

bronchi

• Lungs-Main organs of respiration, two in number (one on each side of heart) Conical in 

shape, divided into lobes

Parts Conductive Parts-Parts of respiratory system where exhcange of gases does not take 

place, include Nose, larynx, trachea, and bronchi.

Respiratory Parts- Parts of respiratory system where exchange of gases takes place, Incude 

Lungs

Functions- Gaseous Exchange, Excretion of carbon dioxide, Oxygenation of blood