Human Body
Chapter 3
Respiratory System
Without oxygen death Parts
will result in 4-6 minutes
Oxygen is made
available to the body
through the respiratory
system
Nose Trachea
– Brings air into the body – Windpipe
– Warms & filters the air – Leads to the lungs
Pharynx Larynx
– Common pathway for food
& air Lungs
– Routes food to the
– Bronchial tubes lead to
esophagus and air to the
lungs
trachea
Normal swallowing controls do not work
if unconscious
That is why 1st aiders should never pour liquids
into the mouth of an unconscious person in an
attempt to revive them. The liquid may flow
down into the windpipe and suffocate the victim
Respiration – process of breathing
Inhalatg in
Exhalation – breathing out
Normal Respiratory Rates
Adult breathes/minute
Children breathes/minute
Infant breathes/minute
What happens to this rate laying down, sitting
up, & standing?
Sx of respiratory distress
Rate of breathing
Cool & clammy skin
Pale &/or cyanotic
Nasal flaring
Abnormal breathing
noises
Circulatory System
Responsible for Parts
circulating blood to cells – Blood
& organs – Heart
– Blood vessels
Blood – carries nutrient & other products
Heart – pumps blood through the vessels
– Series of contraction & relaxation
Blood vessels
– Arteries – pump blood to the organs (away from
heart)
– Veins – pump blood to heart (away from body)
Arterial bleeding –
Venial bleeding –
Normal Pulse rates Location
– Adult Carotid
60-80 beats/minute
Femoral
– Children
80-100 beats/minute Radial
– Toddlers
100-120 beats/minute
– Newborns
120-140 beats/minute
Blood Pressure
Pressure exerted by the blood on the arterial
walls
Hypertension or hypotension
Shock –
Sx of Shock
Pale Nausea/vomiting
Cyanotic Decreased bp
Cool skin Decreased temperature
Clammy skin
Rapid pulse
Rapid breathing
Restlessness
anxiety