- Anatomy Lab II
Note: If you are not at home or in your Dorm room, you might have to read this, go outside (or somewhere else), and then come back to enter your data. Unless you don't mind jumping up and down in the library.

For this Lab, we will examine the effects of "rebreathing" air on heart rate (pulse). By re-breathing air from a sack, the CO2 concentration of your inspired air will steadily increase. Obtain a small paper bag, cover your mouth with the bag, tightly enough to create an air-tight seal, then breathe normally while breathing into the sack, If you experience dizziness, nausea, or a headache during this process stop immediately. Record your pulse, while breathing into the bag, at the times listed below.

Time 30 seconds 120 seconds
Heart rate (bpm)    

What is the significance of an decrease/increase in frequency of heart rate? Why would heart rate respond in the way that it did? How does your Heart "know" you are breathing into a bag?

For the last of our Pulse experiments we will examine the effects of a little exercise. perform some moderate exercise (like jumping jacks) for 60 seconds. Record your pulse, after the exercise, below.

Exercise Heart rate (bpm)  

Body Mass Index (BMI) is one of the most accurate ways to determine when extra pounds translate into health risks. We will examine the relationship between BMI and the pulse rates we have obtained. Your body-mass index measures your height/weight ratio. It is your weight in kilograms divided by the square of your height in meters.

Body mass index calculator

Height: feet inches
Weight: lbs.



Your Body mass is:

People with BMIs between 19 and 22 probably live longest. Death rates are noticeably higher for people with BMI indexes 25 and above. Someone with a BMI of 26 to 27 is about 20 percent overweight, which is generally believed to carry moderate health risks. A BMI of 30 and higher is considered obese.

The higher the BMI, the greater the risk of developing additional health problems. Heart disease, diabetes and high blood pressure are all linked to being overweight. A BMI of 30 and over increases the risk of death from any cause by 50 to 150 percent, according to some estimates.

Enter your pulse data and BMI below.

Once you submit your data, you can look at the Data Set for the whole class. You probably should print this page before you proceed.

You must enter data in each of the fields.

Name
Age
Do you smoke?
Sex
Body mass Weight (Kg)/Height (M)
Pulse 1 (Resting Pulse)
Pulse 2 (Breathe in bag 120 seconds)
Pulse 3 (After exercise)
Your data will be recorded anonymously.