Observations:
Write your observations about the heart’s external antimony – size shape color
weight. What are the differences between the shape/size of the atria and
ventricles? Describe the aorta and/or pulmonary trunk. Did you find any veins?
Describe them.
Answer: The heart was quit larger then I would
think it would be for a pig. The shape was similar to a heart that we all look
at if u crop out the two bumps on the top and change them. The colors from the
top started off like pink as we looked at the left atrium it was somewhat
purple. I would compare the weight to be about 5 lb it was quite large so it had
some weight to it. The size and shape between the two sides were similar you
couldn't really tell them apart. We did find a veins on the left ventricle I
think they were the coronary arteries and veins.
Observations: Write
about the thickness of the walls of the ventricles- compare R and L. Valves
& Chordae tendinae- What do they look like and feel like? Inside of the
atria and ventricles- any observations on size shape color. Inside of the blood vessels- any observations
on size, shape and color.
Answer: The left ventricle has thicker walls than
the right because it needs to pump blood to most of the body when the right
only pumps to the lungs. The valves are a like hot pink and they’re a thick
piece of meat between the atrium and ventricles. As for the Chordae Tendinae
their thin stingy things that are strong and there also had to pull on! The
more muscle parts are more of a light pink where more thick parts have the
purplish color to it.
Questions:
1.
What was the most surprising thing about dissecting the heart?
Describe what your expectations were and if they were met.
2.
Why are the atria and ventricles so different (compare their
structure to their function)?
3.
Why is the left ventricle more muscular than the right?
4.
What are functions of the heart valves? Describe how the
structure of the valves relates to their function (including chordae tendinae).
5.
Use one of your pictures to trace the path of blood through the
heart (add arrows?)
Answers:
1. As we where cutting the
heart it was hard but the muscle was mostly the hard part since it was stretchy.
I was surprise with the blood I thought there would be more blood squirting
everywhere. But I was satisfied with the lab in general.
2. I wouldn't think that the top so the atria
would be bigger in thickness of walls. When the ventricles on the bottom with
the thinner walls. I think that the functions do go well with these structures.
3. The
left ventricle is bigger because it sends blood to the whole body when the
right only sends it to the lungs.
4. The
valves help the blood shoot in one way and the chordae tendinae help the hearts
to sides so up and down stay apart but together.
