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Leaving certificate biology
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Unit 1Ecology theory5 Topics|1 Quiz
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Nutrient recycling4 Topics|1 Quiz
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Ecological relationships and population dynamics2 Topics
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Human impact on the ecosystem2 Topics
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Study of a grassland ecosystem3 Topics
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Responses in the Flowering Plant4 Topics|1 Quiz
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Unit 3Sexual reproduction in the flowering plant1 Topic
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The human reproductive system3 Topics
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The menstrual cycle2 Topics
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Pregnancy2 Topics
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The circulatory system4 Topics
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Blood5 Topics
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The heart5 Topics
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Lesson 13, Topic 1
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The heart
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What is the heart ?
The heart is a hollow muscular organ located behind the breast bone slightly on the left hand side of the chest
The pericardium
The pericardium is a protective sac that surrounds the heart that allows for friction free movement
Cardiac muscle and the coronary arteries
Cardiac muscle is different to other muscle types as it does not tire.
Cardiac muscle has its own blood supply consisting of the coronary blood vessels
Internal structure of the heart
Functions of the parts of the heart
