The Youth Scientists Journal

Author Archive

In this week practical, we are investigating the effects of different exercises on the human body. Our subject in this experiment is Vanessa, one of our team members and the exercise assigned to us is to walk up and down the stairs. We measure the breathing rate, heart rate, body temperature and the oxygen concentration before the experiment started. Then, Vanessa walked up and down the stairs for 1 minute before we measure the breathing rate, heart rate, body temperature and the oxygen concentration again, we did this 4 more times, and also record the data for 5 more minutes while cooling down.

ANALYSIS AND SYNTHESIS OF EXPERIMENT

Before exercise

temperature/˚C         EKG          Oxygen Level         Breathing Rate/ 20 s
1              35                           1.5                       4                                        7

During exercise

temperature/˚C      EKG     Oxygen Level      Breathing Rate/ 20 s
1     34                                1.75           11.5                                  5
2     34                                1.75           11.2                                  7
3     34                                2                  9                                       6
4     33                                2                  8                                       7
5     34                                2                  12                                    7

cooling down

temperature/˚C             EKG            Oxygen Level          Breathing Rate/ 20 s
1     34                                        1.5                       8                                     6
2    33                                        2.5                       4.5                                 6
3    32                                        1.5                       5.5                                  6
4    32                                        1.2                       5                                      7.5 5
5    33                                        1.25                     7                                    6

Table of our collated results

group members :

Munshi
Cinthia
Jia Yi
Vanessa

We first started observing the exterior surface of the heart and labelled the different parts.

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Labelled heart.

Next, we started cutting the heart longitudinally.

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The heart after being cut into half.

 

After dissecting the heart, we identified the different parts of the heart and labelled them.

Picture of a Labelled diagram of a goat heart:

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After labelling and drawing the heart, we proceeded to look at the different slides under the microscopes, and recorded our observations down.

Pictures of the slides we saw:

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And here is a video on how to use a microscope.

http://www.vimeo.com/5910626

 

 

Done by Group:

Cinthia

Vanessa

Munshi