Download The Circulatory System

The Circulatory System
From the moment it begins beating until death, the heart works constantly. Each day, the heart beats over
one hundred thousand times. In an average lifetime, it beats approximately two and a half billion times,
without ever stopping to rest. The heart provides the power needed for life.
Instructions: Find the answer to each question by visiting the website(s) listed under it. Answer in complete
sentences.
1. Find the heart with a virtual stethoscope. Describe its location.
http://www.smm.org/heart/heart/steth-f.htm
2. Label your heart hand-out using these sites as a reference.
http://www.smm.org/heart/heart/in-out-f.htm
&/or
http://www.nucleusinc.com/animation2.php
&/or
http://www.smm.org/studio3d/julie/1a.htm (This site explains the function of each part of the heart).
3. Take your pulse for 15 seconds. Then use the heartbeat calculator to answer the following questions:
How many times does your heart beat in 1 min., hour, day, year?
http://www.smm.org/heart/tools/calculator.html
4. Demonstrate your understanding of how blood flows through the heart by numbering each chamber or
blood vessel that it passes through, starting with number 1 (use the heart hand-out once again).
http://www.pbs.org/wgbh/nova/heart/heartmap.html
5. Copy the table below on your paper, & explain what is happening at each step in the pathway of blood
through the heart.
http://www.pbs.org/wgbh/nova/heart/heartmap.html
Step # Blood at: Blood coming from Blood going to
1 Rt. Atrium Body Rt. Ventricle
√
2 Rt. Ventricle
Pulmonary artery
3
4
5
6
6. Observe how blood flows to and from the heart.
http://www.smm.org/heart/heart/circ-f.htm
Oxygen-rich blood (√)
Oxygen-poor blood (√)