PHA1500 STRUCTURE AND FUNCTION OF THE HUMAN
BODY
MODULE 4 REFLECTION ASSIGNMENT
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Save this document to your computer. Answer all questions below and
upload the completed document before the assignment due date. Refer to the
rubric for grading criteria.
Short Answer Questions
Directions:
For each short answer question, please type your response below the
question.
1.
What is the function of the cardiac conduction system? Within this
system, what is the specific role of the SA node?
The cardiac conduction system sends the signal to start a heartbeat. It
also sends signals that tell different parts of your heart to relax and
contract. This process of contracting and relaxing controls blood flow
through your heart and to the rest of your body. The role of the SA
node acts as the heart's normal pacemaker. It initiates an action
potential that results in an electrical impulse traveling through the
heart's electrical conduction system.
2.
What is the role of red blood cells in the body? Where within the body
do red blood cells become reoxygenated? What method of transport
moves oxygen between the blood and the body tissues?
The role of the red blood cell is to carry oxygen from the lungs and
deliver it throughout our body. Red blood cells become reoxygenated
in the lungs. The method of transport moves the oxygen between the
blood and the body tissues is called Haemoglobin. These molecules are
inside the red blood cells where they pick up and carry the oxygen.
