Transcript Challenge Problem 3/27

Warm-Up
1. T/F The liquid portion of blood is
called plasma
2. What are the three types of blood
vessels?
3. Blood flows from the right
ventricle to the ___________
Respiratory System
What does it do?
Your Breathing
1. Have a partner count the number of
breaths you take in 15 seconds.
Multiply that number by 4 for the
number of breaths per minute.
2. Now, take a deep breath and hold it for
as long as you can. Have your partner
record your time.
Your Breathing
1. Why are there differences in breathing
rates among members of the class?
2. What factors might affect how long
you could hold your breath?
3. A child having a tantrum declares she
is going to hold her breath “until I turn
blue!” Do you think this is possible?
Function
• Brings oxygen
into the blood
and tissues
and carbon
dioxide out to
the air.
Nasal Passageway
• First structure of the respiratory system.
• Mucus moistens the air and traps dust.
• Cilia sweep dust so that it is swallowed or
spit out.
Structures
• Pharynx
– Passageway for air
and food
• Larynx
– Vocal cords
• Trachea
– Passageway for air
only
Structures
• Bronchi
– Passageway
from trachea to
lung
• Alveoli
– Air sacs in lungs
that are used for
gas exchange
Gas Exchange
• There are 150
million alveoli in
each healthy lung.
• Oxygen diffuses
from alveoli into
blood cells
• Carbon Dioxide
diffuses out of blood
cells and into avleoli
Lung Capacity
• What do you think Lung Capacity is?
• What factors do you think affect Lung
Capacity?
Lung Capacity
• Tidal Lung Capacity
– The amount of air moved in and out of your
lungs in one normal breath
• Vital Lung Capacity
– The amount of air exhaled after one DEEP
breath
• Experimental Value
– Actually measure how much air you exhale
• Calculated Value
– Calculate how much air you should be able to exhale
based on body surface area and age
Breathing
• The diaphragm is a muscle at the bottom of
the chest cavity that controls breathing.
• The diaphragm contracts when a person
inhales.
• When using force to blow out, other muscles
are used.
Let’s Review
• What is the first structure of the
Respiratory System? Nasal Passage
Alveoli are air sacs located in
• The _________
Lungs where gas exchange
the __________
occurs
Pharynx is a passageway for
• The _________
both food and air
• List the following structures in order:
– Bronchi, Larynx, Nasal Passage, Trachea,
Alveoli, Pharynx