Preliminary PDHPE
Core 2
The Body in Motion
The Respiratory System
The Respiratory System
 1. Functions of the Respiratory System
 To enrich the blood and supply the cells and
subsequently the body with oxygen for cellular
respiration.
 To remove toxic carbon dioxide, produced by
cellular respiration, from the blood and body.
Structure of the respiratory
System



Lungs - Large paired organs in
the thoracic cavity.
Bronchi – Tubes branching from
the trachea which carry air to
and from the lungs. They
continue to branch into smaller
secondary and tertiary bronchi
and finally into bronchioles. This
network is often referred to as
the bronchial tree.
Alveoli – Tiny sacs in the lungs
that are the site of gaseous
exchange.
http://www.smm.org/hea
rt/lungs/top.html
Structure of the Respiratory
System

Alveoli – Tiny sacs in the lungs that are the site of
gaseous exchange.
Respiratory Function
.Respiration involves the following
processes;
Pulmonary ventilation – movement of air into the alveoli.
Pulminary diffusion – exchange of gases in the blood
Transportation of Gases - movement of gases in the
blood to the cells
Internal respiration – exchange of gases from the
blood to the cells
Respiratory Function

http://www.pwnyoutube.com/watch?v=v
u_ONM3Bj9A&feature=related