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Leaving certificate biology

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  1. Unit 1
    Ecology theory
    5 Topics
    |
    1 Quiz
  2. Nutrient recycling
    4 Topics
    |
    1 Quiz
  3. Ecological relationships and population dynamics
    2 Topics
  4. Human impact on the ecosystem
    2 Topics
  5. Study of a grassland ecosystem
    3 Topics
  6. Responses in the Flowering Plant
    4 Topics
    |
    1 Quiz
  7. Unit 3
    Sexual reproduction in the flowering plant
    1 Topic
  8. The human reproductive system
    3 Topics
  9. The menstrual cycle
    2 Topics
  10. Pregnancy
    2 Topics
  11. The circulatory system
    4 Topics
  12. Blood
    5 Topics
  13. The heart
    5 Topics
Leaving certificate biology The heart The heart
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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