(Unit 3) To dissect, display and identify the parts of a heart
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Distinguish between systole and diastole.
S = heart muscle is contracting D = heart muscle is relaxing
Explain how you distinguished the front of the heart from the back.
• location of the coronary artery at the front • front is more rounded with thick-walled arteries • lower left is firmer than lower right
Name a piece of equipment used to make an incision.
scalpel
State the location of the tricuspid valve.
between right atrium and right ventricle
What did you do to expose the semi-lunar valve?
cut into the aorta
Difference between the right side and the left side after dissecting?
wall of left ventricle was thicker than the wall of the right ventricle
Difference betweeen the walls of the right and left ventricles?
the walls of the left were thicker
Name the protein responsible for transporting oxygen.
haemoglobin
Why is the blood in the right side of the heart kept seperate from the blood in the left side?
Stops oxygenated and deoxygenated blood from mixing
Diastole means?
relaxation (heart muscle is relaxing/relaxed)
How did you identify the right-hand side from the left-hand side of the heart?
left thicker/firmer
On which surface of the heart did you observe the coronary artery/groove?
front ventral
Describe how you dissected the heart to identify the bicuspid valve.
cut/make an incision with a scalpel on left side on a dissecting board valve between top and bottom chambers wash after/sterilise
State precise location of one semilunar valve. Describe how you further dissected the heart to locate this valve
base of aorta, cut into the aorta/pulmonary artery
Where did you locate the tricuspid valve? Describe how you exposed this valve.
between the right atrium and left ventricle, cut through thr right side of the heart using a scalpel
Where did you find the semilunar valves?
at the base of the aorta/pulmonary artery
Name the cavity of the body in which the heart and lungs are located.
thoracic/chest
How do heart muscles differ from other muscles in the body?
don’t tire (involuntary)
Describe the steps you followed to identify and display the inner structures of the heart.
identify the front (left is firmer and noticed the coronary arteries) use scalpel and dissecting board 1st & 2nd cuts: left ventricle 3rd & 4th cuts: right ventricle 5th & 6th cuts: atria 7th cut: pulmonary artery 8th cut: aorta use flag labels cut away from body/wash heart etc
What did you do to expose a semi-lunar valve?
cut open aorta/pulmonary artery
Contractile?
shorten/contract
Which chamber of the heart has the greatest amount of muscle in its wall?
left ventricle
What is the semi-lunar valves function?
stops back flow of blood
Where did you find the origin of the coronary artery?
aorta