Pre-Lab: Tidal Volume and Lung Capacity
Problem What factors can affect lung capacity?
Materials round balloons, metric ruler, meter stick
Lab Manual Chapter 33 Lab
Skills Focus Measure, Form a Hypothesis, Design an Experiment, Interpret Graphs
Connect to the Your lungs and circulatory system work together to provide the oxygen your cells need for cellular respiration. In your lungs, oxygen diffuses from the air you inhale into your blood. Carbon dioxide, a waste product of cellular respiration, diffuses from your blood into the inhaled air. Your lungs must have a large enough volume, or capacity, to supply all your cells with the oxygen they need.
Most of the time your lungs do not fill to capacity. But they can take in more air when you want to dive underwater or when you want to sing a long phrase without having to take another breath. In this lab, you will measure the volume of air you exhale when you are breathing normally and the volume of air you exhale after you take a deep breath.
Sequence List in order, from exterior to interior, the parts of the respiratory system that air passes through as you inhale.
Review Why does oxygen diffuse from inhaled air in the alveoli into the capillaries?
Compare and Contrast What is the difference between respiration and cellular respiration?
Preview the procedure in the lab manual.
Control Variables What is the one difference between the procedures in Part A and Part B?
Design an Experiment Why must you use round balloons for this experiment?
Predict Which do you think will be greater—your estimated vital capacity or your measured vital capacity? Why?
Visit Chapter 33 online to test yourself on chapter content and to find activities to help you learn.
Untamed Science Video Bundle up as the Untamed Science crew journeys to cold climates to show us how some animals handle extreme environments.
Art in Motion View a short animation that shows the beating of the heart as well as the transmission of impulses from the SA and AV nodes.
Art Review Review your understanding of the different parts of the respiratory system.
InterActive Art Watch an animation that shows the process of breathing and the production of sound.
Data Analysis Use electrocardiography to diagnose various heart conditions.
Visual Analogy Compare the structure and function of the circulatory system to a system of highways and secondary roads.