Lab 22: The Heart - A Muscle

Warm Up: What is your heart made of? Can you exercise your heart? How? (skip 4 lines)

Vocabulary:
1. function – an objects job or role

2. model – a smaller or larger version of an object that is too small or too big to observe in a classroom

3. range – from one set value to another set value

4. structure – what an object is made of and how the object is shaped

5. volume – the amount of three dimensional space any gas, liquid, or solid takes up

Data: Chart to record volume of water (skip ½ page)

Analysis Questions:
1. Compare the pressure pump model to what you know about your heart. In what ways do you think the pressure pump is a good model for your heart? What are the weaknesses of the pressure pump as a model for the heart? (skip 4 lines)

2. Use figure 1 on page B62 to find out how much blood your heart pumps per minute based on your height.

a. Record the volume of blood (in liters) pumped by your heart each minute. (skip 2 lines, done in class)

b. Compare the amount of blood your heart pumps each minute to the amount of water you were able to pump: was the amount more or less? By how much? (skip 4 lines, done in class)

3. Describe how hard your heart works by using quantitative and qualitative data from this activity. Hint: Be sure to look at your notes from this activity. (skip 4 lines)

4. Why do you think that exercising regularly decreases your heart rate? (skip 4 lines)