Transcript Respiratory System

Monday December 2, 2013
Bell work
What does this mean to you ?
Some people dream of success
while others wake every day
and work hard for it
Monday – Notes on Respiratory System
Tuesday – Notes on Respiratory System
Wednesday – Worksheet Due * Go over and practice
Thursday – Review for Test
Friday – Test on Respiratory System
Special adaptations for
exchange of gases (CO2 & O2)
involved in aerobic respiration
Respiratory surface
– Place where environmental oxygen 1st diffuses into
cells
– Characteristics
• Moist
• Thin
• In contact w/ environmental source of O2
Respiratory System
• Bring oxygen to the respiratory surface & blood
• Remove CO2 from blood and body
1. Nasal cavity –
Warms air and mucus
catches dust.
1. nasal cavity –
2. pharynx – (throat)
Larynx
1. nasal cavity –
2. pharynx –
3. Trachea (wind pipe)
Larynx – voice box
Larynx
1.
2.
3.
4.
nasal cavity –
pharynx –
epiglottis
Trachea (wind pipe)
Larynx – voice box
5. Bronchi (Bronchus)(1st branch)
6. bronchioles
(Bronchiolus)(all the branches in the lung)
the trachea, bronchi and
bronchiole all contain
• cartilage rings
Holds tubes open so air
flows freely
• Mucus
Traps particles
(dust/pathogens)
• Cilia
What do you think the function of
each is?
Pushes mucus towards
esophagus to be
swallowed
Alveoli – Human respiratory surface the place where
CO2& O2 exchange
…w blood
Guess what the background picture is of?
Alveoli are
• Air filled sacs
• Surrounded by
Blood capillaries
Why is it more efficient to have thousands of little sacs
(alveoli) rather the 1 or 2 big sacs for gas exchange?
Alveolus A
Capillary B
What gas would diffuse
from the alveoli into the
blood?
O2 alveoli space -> blood
capillaries
What gas would diffuse out
of the blood and into the
alveoli?
CO2 blood capillaries-> alveoli
space
What’s this
tube?
What’s a lung?
Lung – sac that contains the
alveoli & brochioli & ends of the
bronchi
It has the texture and feel of a
wet sponge
Tuesday December 3rd
Bell work
Answer the following questions 
1. What is a respiratory surface?
2. What characteristics must a
respiratory surface have?
3. What is the respiratory surface in
humans?
4. What prevents the trachea from
collapsing between breaths?
5. What helps prevent particles
from getting into your lungs?
CLOZE ACTIVITY
• Read the passage.
• Fill in the missing words using the
word bank at the top of the page.
• Please do this quietly by yourself.
Breathing
Involves the contraction
and relaxation of your
rib & diaphragm
muscles
Inhaling
rib muscles pull ribs out,
diaphragm contracts & moves down
(this creates more space in lungs)
•
volume of lungs ∴
•
Pressure, Air moves from high 
low P ∴ air moves into lungs
Exhaling
 rib muscles & diaphragm relax
• Lung volume
• Lung P , air moves from
lungs to atmosphere
What controls the rate of
breathing?
Respiratory rate is
regulated by
• Medulla
• Measures pH
–
CO2
pH
breathing &
1.
2.
3.
4.
Inhaled oxygen diffuses from the alveoli into ___
What type of blood cell carries oxygen?
Which way does the diaphragm move when it
contracts?
Would you be inhaling or exhaling?
5.
Emphysema & bronchitis both upset homeostasis
in your body by …
6.
7.
What gas does your brain register in order to regulate
breathing rate?
Would the diagram below represent a capillary in the
alveoli or in some other body tissue? Explain.
CO2
O2
8. What is this a diagram
of?
9. What type of blood
vessels are B
10. Which blood vessel A/C
would be highest in
oxygen?
11. Lowest in carbon
dioxide