Heart Dssection

Heart Dissection

You will be exploring the heart, making observations, taking pictures and labelling them during this dissection.  And posting all of this to your blog!

External anatomy: 

Internal Anatomy:

please note that sideways pictures where not intentional. Skitch  unfortunately flipped them. 

Observations:  The outer parts of the heart were very muscular and thick. The septum was distinguishable as its coloration was white going across the deep red heart. It size was a little larger than my hand and was very cold , due to it being previously frozen. Once it thawed out and was rinsed with warm water , the insides of the valves felt stretchy yet strong. To be expected ,it was hollow inside with enough room to wiggle my finger around. In one of the valves there were a considerable sized blood clot. 

 Cutting the heart with scissors  was difficult because It  was very muscular ,the left ventricle being a lot thicker. Inside the heart was different shades of red , with the exemption of the Cordae Tendenae. Which was white and very stretchy. Also to be noted the wall of heart were deep purple.  the texture inside was slippery with ______ lining around it.  The semi lunar valves where present and were little stretchy flaps that when stretched looked like pockets.

Questions: 

1. I've  already cut a heart before ; however , I forgot what it looked like inside as well as I now new more information that it was more interesting to me.  I re- surprised myself. The most shocking part was how stretchy both the Chordae Tendinae and the Semilunar Valvles where.

2. The Atria and the ventricles are different as  ventricles are required to be larger. The artuims purpose is to collect the blood and direct it to the ventricle which is where the blood is being physically pumped. Making it more muscular.

3. The left ventricle was more muscular than the right because right ventricle only needs to carry de-oxygenated blood to the lungs and back , rather having to push  oxygenated blood throughout the whole body. head , feet , everything. 

4. The heart valves are very stretchy flaps as well as the Chordae Tendinae which are thick but strong. their purpose to keep the blood flowing where its suppose to be flowing. The heart could not work if blood was aimlessly flowing. it would never get to where it needed to be. 

5.

For the left side of the heart , (which deals with oxygenated blood) It is first transported through the pulmonary veins which then collects in the left atrium again being conducted to the left ventricle passing a semi lunar valve which is then pumped out of the aorta to be distributed to the body.