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Respiratory System

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Respiratory System. Objective 1. See diagram. Pathway:. Nostril—sinuses—pharynx—larynx—trachea—bronchi—bronchioles—bronchiole tube--alveoli. alveoli. Objective 2: Protection. Mucus collects dust and debris Cilia propel mucus Hairs filter air. Objective 3 Membrane Structure

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objective 1
Objective 1
  • See diagram
  • Nostril—sinuses—pharynx—larynx—trachea—bronchi—bronchioles—bronchiole tube--alveoli
objective 2 protection
Objective 2: Protection
  • Mucus collects dust and debris
  • Cilia propel mucus
  • Hairs filter air

Objective 3

Membrane Structure

Single cell layer thick

Covered with capillaries

Allows rapid exchange of gases

objective 4 lungs pleura
Objective 4: Lungs/Pleura
  • Left Lung—two lobes
  • Right lung—three lobes
  • Pleura—thin lining on outside between lung and thoracic wall
  • Locate the respiratory structures on the cat pluck.
  • Insert the pins in the structures.
day 2

Day 2


Look over 6 weeks grades

Conduct lung volume lab

respiration unit day 3

Respiration Unit Day 3

"Virtue herself is her own fairest reward."-Silius Italicus, Punica

today s agenda
Today’s Agenda
  • Look over air flow sequence
  • Notes on objective 5-9
  • Lung volume Lab
boyles law and breathing
Boyles Law and Breathing
  • Boyles Law: Pressure of a gas varies inversely with its volume. Inspiration lowers pressure in thorax, air flows inward. Expiration raises pressure, air moves out.
objective 6 muscles of inspiration
Objective 6: Muscles of Inspiration
  • Inspiration occurs when the diaphragm and the intercostal muscles contract.
  • Expiration occurs more passively as these muscles relax and the lungs recoil.
obj 7 partial vacuum
Obj. 7 Partial Vacuum

The intrapleural space (space between lung and wall of chest) always has a more negative pressure than the interpulmonary space (inside lungs).

obj 7 partial vacuum1
Obj. 7 Partial Vacuum

The negative pressure must exist at all times to keep the lung in its proper shape and location to prevent lung collapse.

obj 8 pulmonary ventilation
Obj. 8 Pulmonary Ventilation
  • Friction in airways causes resistance and results in more strenuous breathing.
  • Lung compliance depends on the elasticity of the lungs and chest flexibility.
obj 8 pulmonary ventilation1
Obj. 8 Pulmonary Ventilation
  • Surface tension of alveolar fluid reduces alveoli size and could collapse alveoli.
obj 9 lung volumes
Obj. 9 Lung Volumes
  • Tidal volume – normal inhale/exhale amount
  • Residual volume – air that remains in lungs after exhale.
obj 9 lung volumes1
Obj. 9 Lung Volumes
  • Inspiratory volume – amount that can be forcefully inhaled
  • Expiratory reserve – amount of forced exhale
today s agenda1
Today’s Agenda
  • Revisit Lung Volumes and gross anatomy.
    • Quiz
    • Complete Volumes worksheet using summary chart in notes
  • Notes on objectives 10-13
today s agenda2
Today’s Agenda
  • Notes on objectives 10-13
  • Respiration video
  • Practice questions
obj 10
Obj. 10
  • Oxygen goes into blood @ alveoli
  • Oxygen moves from blood into cells at the capillary bed.
  • Oxygen is transported by hemoglobin.
  • Carbon dioxide is most likely transported at bicarbonate ion.
obj 11
Obj. 11
  • Oxygen is transported in the blood attached to hemoglobin

HHb + O2 --> HbO2

objective 12
Objective 12
  • Carbon dioxide is carried in the body primarily as bicarbonate ion.

CO2 +H2O -->H2CO3-->H + CO3-

respiration unit day 6

Respiration Unit: Day 6

"The scientific theory I like best is that the rings of Saturn are composed entirely of lost airline luggage."-Mark Russell

today s agenda3
Today’s Agenda
  • Complete Objective Notes
  • Practice matching symptom & disorder
  • Homeostatic Imbalances sheet
obj 111
Obj. 11
  • Oxygen is transported in the blood attached to hemoglobin

HHb + O2 --> HbO2

objective 121
Objective 12
  • Carbon dioxide is carried in the body primarily as bicarbonate ion.

CO2 +H2O -->H2CO3-->H + CO3-

obj 13
Obj. 13
  • Respiration rates can be effected by emotions, pain, carbon dioxide levels and reflexes.
  • (see separate sheet for notes)
Eupnea = Normal breathing

Apnea = to stop breathing

Hyperpnea = excess breathing due to exercise and increased need.

Dyspnea = labored breathing

disorders continued
Disorders Continued
  • Hypoxia= Chronic Oxygen deficiency
  • Bronchitis = respiratory passageways become clogged by elevated mucus production.
  • COPD = chronic obstructive pulmonary disorder resulting from the combination of chronic bronchitis and emphysema.
  • TB= tuberculosis-bacterial infection of lungs, airborne
  • Emphysema = bronchiole walls are damaged, difficulty in normal breathing causes barrel chest.
  • Lung cancer = excessive cell division of lung tissues, has been directly tied to smoking.