Transcript Respiration Notes

Respiration
Notes
Essential Question
How do the respiratory
and excretory systems
promote homeostasis in
the body?
Functions
1. Supply oxygen to the body
a. Breathing - the movement of the
chest that brings air into the lungs and
removes waste
b. Respiration - Oxygen is used by the
cells to release energy from sugar.
The chemical equation for
respiration is:
C6H12O6 + 6O2 6CO2 + 6H2O
Glucose + Oxygen
Carbon Dioxide + Water
Organs
1. Pharynx - tubelike
passageway used by
food, liquid, and air.
2. Epiglottis - tissue flap
at lower end of pharynx
that prevents food or
liquids from entering
the airway.
Organs
3. Larynx - the voice box,
which lies in the front of
the throat. It is seen on the
outside as the adams apple.
4. Trachea - the main tube
through which air passes to
and from the lungs, also
called the windpipe.
Organs
5. Bronchi - two short
tubes that lead to the
lungs
6. Alveoli – Where
oxygen and carbon
dioxide are
exchanged.
Organs
7. Diaphragm - muscle that
contracts and relaxes to
move gas in and out of the
lungs.
Breathing
1. Signals from your brain tell muscles in
your chest and abdomen to contract
and relax.
2. If carbon dioxide levels increase
and oxygen levels decrease,
breathing rate increases.
Diseases or Disorders
• Emphysema - disease in which the
alveoli in the lungs enlarge. Blood
becomes low in oxygen and high in
carbon dioxide, shortness of breath
occurs.
• Asthma - Disorder in which bronchial tubes
contract quickly causing a shortness in
breath, wheezing, or coughing.
1. The muscles surrounding the
bronchial tubes contract
excessively thus narrowing the
airways.
2. The lining is red and swollen
(inflamed) causing further
narrowing.
3. Sticky mucus secretions block
the airways.
2. Nasal passageway
1. epiglottis
3. Pharynx
4. trachea
5. Bronchial tubes
6. bronchi
7. diaphragm
8. alveoli