Respiratory System

Write the BLACK Read the RED

WHAT DO YOU KNOW ABOUT THE RESPIRATORY SYSTEM?

Follow along on pg. 99 of workbook

Functions of the Respiratory System bring O 2 (oxygen) into the body and excretes CO 2 (carbon dioxide) a by-product of cellular respiration

Cells can’t burn nutrients for E without oxygen (O 2 ) (like a candle under a cup) Cellular Respiration =in mitochondria Nutrients + oxygen  E + carbon dioxide + water

The air we breathe The air we inhale is :The air we exhale is: Nitrogen (N) 78%Nitrogen78% Oxygen (O2)21%Oxygen16% Carbon Dioxide 0.04%Carbon Dioxide5% Other gases< 1%Other<1%

Using pg. 173 of textbook, fill in pg. 99 of workbook

Check your answers 1. Nose 2. Nasal passage 3. Trachea 4. Lungs 5. Pharynx 6. Epiglottis 7. Larynx 8. Bronchi

Lung model

Nasal passages o Function: o hairs filter air o mucus warms and moistens air

The Pharynx (throat) Function: air  trachea and food  esophagus. When swallowing, epiglottis seals trachea.

Larynx (voice box) Function: Carries air produces sound The epiglottis closes when food is swallowed blocking the airway (no sound)

Naturally 7- vocal range

Warning: Next slide is a bit graphic

Trachea Function: filters with cilia warms and moistens with mucus. Cartilage rings = keep it rigid and open. larynx bronchus trachea Lungs Collapsed esophagus trachea Cartilage rings

Could replace snot activity with lab 54 lung volume. You may need to change lab a bit as containers = only 2L

Snot Fair Activity 10 ml of water 10 ml of corn syrup 1 drops of food colour 100 ml beaker. 1.5 g of gelatine pencil shavings

Add 10 ml water, 10 ml corn syrup and 1 drops of food colour into 100 ml beaker. Weigh out 1.5 g of gelatine, mix, and heat mixture until the gelatine has dissolved Carefully remove the heated beaker and stir until mixture is cool. It will thicken as it cools (about 20 minutes). Pour a small amount onto your palm and add a sprinkle of pencil shavings. Watch what happens.

Equipment 10 ml Corn syrup 10 ml cold water 1.5 g Gelatine Green food colour Pencil shavings 100 ml beaker Stir rod Weigh paper Balance Hot plate

bronchioles bronchi trachea Function: Carry air to and from lungs. Branches into bronchioles Bronchi

Lungs Function: gas exchange between body and external world

The lungs There are 2 lungs which are not identical. Why?

Homework pg. 100 in workbook

Lab #55 Physical activity and Respiratory Rhythm

Australian resp. movie

Follow along on pg. 101 in workbook

REMEMBER????? Air = mix of gases, gases are compressible= volume can increase or decrease Changes in volume = changes in P Fluids ALWAYS flow from high P to low P

Use pg. 175 of textbook to fill in pg. 101 of workbook (top chart)

The Respiratory system Inhaling 1. Intercostal muscles and diaphragm contract 2. Ribs rise, diaphragm lowers= increase size of rib cage 3. Lung volume increases 4. Air pressure inside lungs = decreases (lower than outside) 5. O 2 rich air flows into lungs until pressure is equal Check Your Answers

The Respiratory system Inhaling 1. Intercostal muscles and diaphragm relax 2. Ribs lower, diaphragm rises = decrease size of rib cage 3. Lung volume decreases 4. Air pressure inside lungs = increases (higher than outside) 5. CO 2 rich air flows from lungs to outside until pressure is equal

Use pg. 176 of textbook to fill in pg. 101 of workbook (bottom picture)

Check Your Answers Bronchiole Network capillaries Alveolus O 2 into blood CO 2 from blood capillary

Gas Exchange- Inhale the alveoli are filled with air. Lungs = higher concentration of oxygen (O 2 ) than blood the oxygen diffuses (a movement of particles) from lungs  blood and attaches to the red blood cells (RBC’s).

Gas Exchange- Exhale Blood = higher concentration of carbon dioxide (CO 2 ) than the lungs Carbon dioxide diffuses from blood  lungs where it is excreted (process of eliminating waste) as we exhale.

Discussion pg. 195 in textbook, Q 7-9

Let’s go for a smoke activity Materials needed: 1 clear - not colored bottle 2 moistened cotton balls 1 length of clear tubing 1 cigarette and lighter

Procedure: 1. place the moistened cotton balls inside before re- capping the bottle. 2. Insert tubing so that it runs into the bottom of the bottle. (the other end of the tip protrudes from the top) 3. insert one cigarette into the protruding tip end of tubing (you may have to scrunch the cigarette a bit). Light the cigarette – then very gently begin squeezing the bottle to simulate "breathing."

Homework questions 1) What parts of the respiratory system are represented by: the bottle, tube, cotton balls? 2) What (be specific) is causing the observed colour change? 3) What chemicals and substances are found in cigarettes (first 5 ONLY) ? 4) What is nicotine? 5) Describe what you did and what you observed? Supplement your answer with your knowledge from class. (this q =approx ½ page)

Homework: pg. 102 of workbook

Bill Nye- Respiration