Warm Up Answer the following questions 1 What

37 -3 The Respiratory System Slide 2 of 37 Copyright Pearson Prentice Hall End

37 -3 The Respiratory System The Human Respiratory System The respiratory system consists of

37 -3 The Respiratory System What Is Respiration? In biology, respiration means different things.

37 -3 The Respiratory System Breathing BREATHING Lungs are sealed in pleural membranes inside

37 -3 The Respiratory System Breathing During inhalation, the diaphragm contracts and the rib

37 -3 The Respiratory System Often exhaling is a passive event. Breathing Air Exhaled

37 -3 The Respiratory System Slide 8 of 37 Copyright Pearson Prentice Hall End

37 -3 The Respiratory System How Breathing Is Controlled Breathing is controlled by the

37 -3 The Respiratory System So what’s a hiccup? • Longest bout of hiccups

37 -3 The Respiratory System Lung Capacity Lab!! (we’ll do next class) Objective Measure

37 -3 The Respiratory System The Human Respiratory System RESPIRATION Alveoli are grouped in

37 -3 The Respiratory System Gas Exchange RESPIRATION O 2 Gas exchange takes place

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Warm. Up Answer the following questions: 1. What are the 3 main types of blood cells? What are their functions? How would you identify them? 2. What is blood plasma – what is its function? Collect materials to complete your blood lab and begin working!!! • SWB/IP book from counter (p. 49) • Slides and Blood figures up on front desk. Slide 1 of 37 Copyright Pearson Prentice Hall End Show

37 -3 The Respiratory System Slide 2 of 37 Copyright Pearson Prentice Hall End Show

37 -3 The Respiratory System The Human Respiratory System The respiratory system consists of the: Pharynx Larynx Trache a. Lungs Nose Mouth Epiglottis Bronchus Bronchioles Diaphragm Copyright Pearson Prentice Hall Slide 3 of 37 End Show

37 -3 The Respiratory System What Is Respiration? In biology, respiration means different things. Cellular respiration is the release of energy from the breakdown of food in the presence of oxygen (occurs in the? ? ? ) At the organism level, respiration is the process of gas exchange—the release of carbon dioxide and the uptake of oxygen that occurs between RBCs and alveoli Breathing is the actual mechanical intake of air Slide 4 of 37 Copyright Pearson Prentice Hall End Show

37 -3 The Respiratory System Breathing BREATHING Lungs are sealed in pleural membranes inside the chest cavity. At the bottom of the cavity is a large, flat muscle known as the diaphragm. Slide 5 of 37 Copyright Pearson Prentice Hall End Show

37 -3 The Respiratory System Breathing During inhalation, the diaphragm contracts and the rib cage rises up. This expands the volume of the chest cavity. The chest cavity is sealed, so this creates a partial vacuum inside the cavity. Atmospheric pressure fills the lungs as air rushes into the breathing passages. Slide 6 of 37 Copyright Pearson Prentice Hall End Show

37 -3 The Respiratory System Often exhaling is a passive event. Breathing Air Exhaled When the rib cage lowers and the diaphragm relaxes, pressure in the chest cavity is greater than atmospheric pressure. Rib cage lowers Air is pushed out of the lungs. Exhalation Slide 7 of 37 Copyright Pearson Prentice Hall End Show

37 -3 The Respiratory System Slide 8 of 37 Copyright Pearson Prentice Hall End Show

37 -3 The Respiratory System How Breathing Is Controlled Breathing is controlled by the medulla oblongata. The medulla oblongata monitors carbon dioxide in the blood. As carbon dioxide increases, nerve impulses make the diaphragm contract, bringing air into the lungs. The higher the carbon dioxide level, the stronger the impulses. Slide 9 of 37 Copyright Pearson Prentice Hall End Show

37 -3 The Respiratory System So what’s a hiccup? • Longest bout of hiccups – 68 years!!! • Check out IPp 50 for more info! Slide 10 of 37 Copyright Pearson Prentice Hall End Show

37 -3 The Respiratory System Lung Capacity Lab!! (we’ll do next class) Objective Measure the amount of air your lungs can hold Slide 11 of 37 Copyright Pearson Prentice Hall End Show

37 -3 The Respiratory System The Human Respiratory System RESPIRATION Alveoli are grouped in clusters. Pulmonary artery A network of capillaries surrounds each alveolus. Pulmonary vein Capillaries Slide 12 of 37 Copyright Pearson Prentice Hall End Show

37 -3 The Respiratory System Gas Exchange RESPIRATION O 2 Gas exchange takes place in the alveoli. CO 2 Oxygen diffuses into the blood. Carbon dioxide in the blood diffuses into the alveolus. Let’s examine this up close Copyright Pearson Prentice Hall Capillary Slide 13 of 37 End Show