The Respiratory System Lets Watch https www brainpop
The Respiratory System Let’s Watch https: //www. brainpop. com/health/bodysys tems/respiratorysystem/
Respiration A. Purpose: to exchange gases between blood and external environment B. Why? food ATP O 2 CO 2 oxygen is needed to release energy from food by the process of cellular respiration: C 6 H 12 O 6 + 6 O 2 6 CO 2 + 6 H 2 O + 36 ATP
C. How? n Gases diffuse across a moist barrier called the respiratory surface (alveoli) thru the capillaries Alveoli Capillary
D. Respiratory Organ Systems: Figure 37 -14 The Respiratory System Pharynx Nose Larynx Trachea Lung Bronchus Mouth Epiglottis Bronchiole Alveoli Bronchioles Diaphragm Edge of pleural membrane • Capillaries How Does Respiration occur in one celled organisms? Gases diffuse across the cell membrane
Organ Function Nostrils Lined with cilia , warms, moistens and filters incoming air Trachea Windpipe made of cartilage Bronchi Two main branches that enter lungs Bronchioles Small air tubes that SPREAD THROUGHOUT THE LUNG Alveoli • Tiny air sacs located at the end of bronchioles • Site of gas exchange (looks like a bunch of grapes)
1. End products ** The end products of aerobic cellular respiration, water and carbon dioxide diffuse into the blood. Then these waste gases are released from the lungs. Were does it occur? n In the alveoli; Figure 37 -15 Gas Exchange in the Lungs Alveoli n n Bronchiole O 2 IN, CO 2 OUT Capillary
Passageway to the lungs: pharynx larynx trachea bronchioles alveoli n nose Memory Device: n Nine People Left Their Book Bags Again COPY these notes on the bottom or top of next page
2. How does it occur? 1) n n n Inhalation (active 2) Exhalation (passive) process) • Diaphragm RISES AND Diaphragm FLATTENS AND RELAXES CONTRACTS • Moving air out (caused by Chest cavity Air rushes into lungs through COLLAPSING) the respiratory tubes, Chest cavity EXPANDS inhale exhale
Y T P X O E C N IS O RE H T U T CT I P How is breathing controlled n n n By the medulla oblongata in the brain Autonomic nerves cause the diaphragm and chest muscles to contract bringing air into lungs. Rate depends on the amount of CO 2 is high, breathing rate fast CO 2 is low, breathing rate is slow
E. Respiratory Homeostasis Disorders 1. Pneumonia n Alveoli fill with fluids and mucus resulting in coughing and breathing difficulties 2. Asthma n Allergic reaction in which bronchiole contractions create breathing difficulties 3. Emphysema n Air sacs lose their elasticity and breakdown resulting in a loss of respiratory surface in the lungs
Add these to the bottom of your notes F. Preventing respiratory disease 1. Not smoking – both first and second hand smoke are damaging 2. Stay away from pollutants 3. Wash hands when possible
A Healthy Lung (outer view) A healthy lung (inside view) A LUNG AFTER SMOKING….
MTV Real Life Emphysema Video – Pam Laffin n “I can’t breathe” http: //vimeo. com/26971447
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