Hayley Tarnasky, April 22/2008 -- 3/3

The goings on of another interesting day in Biology 20!!!:

• first off we were reminded that our permission forms for the cadaver ( science world) thing in edmonton on the tenth of june! whoot whoot!!!


• Then we dove head first into the deep end of reviewing the vital parts of the heart


• we recalled that deoxygenated blood is located in the right portion of the heart


• and that oxygenated blood is in the left side


• We went to page 320 and noticed that the pulmonary artery goes into the lungs


• Also on that diagram was we realized that the pulmonary veins go from the heart to the lungs


• As we continued our enthusiastic review, we remembered that the aorta is an artery


• a capillary :are the smallest of a bodies blood vessels, measuring 5-10 μm in diameter, which connect arterioles and venules, and enable the interchange of water, oxygen, carbon dioxide, and many other nutrient and waste chemical substances between blood and surrounding tissues. (http://en.wikipedia.org/wiki/Capillary)


• Mr. Challoner introduced the brilliant analogy of going from sundre to calgary ( grandma's house) This meant that when your driving on the QE2, you'r'e in an artery then you start going onto the side roads and they get smaller and smaller until you reach residential neighborhoods. There's another clue here, if you go down most roads in smaller areas, there's only room for one car, hence the blood only being able to down capillaries single file.


• One of the last things we went over was the difference between the superior and inferior vena cava. Inferior- lower on the "heart totem pole" and the Superior is higher


• We finally were winding down and we learned how to decifer the left side from the right side of the heart. When you look at a picture of the heart, the right side of the heart is your left side and vice versa


• Lub Dub comes from the atria contracting and ventricles sending out blood to the rest of the body

Thoughts and Opinions

• I thought it was very generous of Mr. C to allow us to review everything so that everything was decidedly as clear as mud ( haha)


• By spending time reviewing and watching movies and videos and powerpoints, it really enhances our perspective and broadens our horizons.


• How much friction does the blood cell cause?

Reach For The Sky!!!:

• There is a ton of friction in a blood cell beause there is only so much space for the cell to go through so, if the capillary contracts at all, then this only increases the pressure on the cell, which in turn creates more friction from the cell moving through the blood stream.


• So i got really curious and wanted to know what was the deal with heart burn! 'Cause even young people get it nowadays, especially when you eat macaroni to fast. So i put up the extra effort and heres what i found : Heartburn or pyrosis is a painful or burning sensation in the esophagus, just below the breastbone caused by regurgitation of gastric acid.[1] The pain often rises in the chest and may radiate to the neck, throat, or angle of the jaw. Heartburn is also identified as one of the causes of chronic cough, and may even mimic asthma. Despite its name, heartburn actually has nothing to do with the heart. It is so called because of a burning sensation of the breastbone where the heart is located although some heart problems do have a similar sensation to heartburn. Compounding the confusion is the fact that hydrochloric acid from the stomach comes back up the esophagus because of a problem with the cardiac sphincter, a valve which misleadingly contains the word "cardiac" (an adjective referring to the heart) in its name.


• So ya, thats it for another day in the rather general bio 20 class!!!! WHOOOOO