Cardiac cycle

Today we'll be working on the heart, focusing on what it does and how.  Answer the following questions in your workbooks:

1. Define systole and diastole, and explain what is happening in the heart in each step. - http://biology.about.com/od/anatomy/ss/cardiac_cycle.htm
2. Why do you think that the left side of the heart is more muscular than the right? - http://www.heartsite.com/html/the_heart.html
3. How does the muscle in the heart get oxygen and glucose? What would it use these things for? - http://science.howstuffworks.com/environmental/life/human-biology/heart5.htm
4. Explain how a heart attack happens.  - http://www.nhlbi.nih.gov/health/health-topics/topics/heartattack/
5. What do the valves in the heart do? Name the four valves in the heart and explain where each one islcoated. - http://www.cts.usc.edu/hpg-valvesoftheheart.html
6. What things can go wrong with heart valves? What can these problems cause? - http://www.nhlbi.nih.gov/health/health-topics/topics/hvd/

Use this link to get a good overall picture of the heart - http://www.bbc.co.uk/science/humanbody/body/factfiles/heart/heart.shtml

Finally, try this link - http://www.quia.com/mc/337933.html