heart physiology

소개글

생리학 시간에 심장에 대한 영문 프리젠테이션 발표자료입니다. 영문으로 발표하는 경우에 도움이 많이 될 것입니다. 내용은 heart의 해부적 특성, 심근의 수축과정, excitation 과정, cardiac cycle, 자율신경계의 심장 조절과정, cardiac output, heart sounds, Imbalance 등의 내용이 있습니다.

목차

1. Heart anatomy

2. Differences of cardiac & skeletal muscles
-Gap functions
-All or none law
-Automicity (Autorhythmicity)
-Length of Absolute Refractory Period
-nodal system

3. Contraction of cardiac muscle
-mechanism
-sequence of excitation
-Special Considerations of Excitation

4. Cardiac cycle & Electrocardiography
- Electrocardiography: Deflection Waves of ECG

5. Regulating Heart Function
- parasympathetic & sympathetic

6. Cardiac output

7. Heart sound & rate
- Murmur
- Regulation of heart rate; thyroxine

8. Imbalance
References

본문내용

1. Heart anatomy: Location
1. Heart anatomy: anterior view
1. Heart anatomy: frontal section
skeletal muscles
Cardiac muscle cells
- 1 or 2 central nuclei
- semi-spindle shape
electrical link (gap junction)
common contraction (syncytium)
- Almost all aerobic
Skeletal muscle cells
multinucleated
cylindrical shape
no gap junctions
independent contract
anaerobic
skeletal muscles
1. Gap junctions - electrically couple all cardiac muscle cells.
2. All-or-None Law Gap junctions allow activation of a small group of cells spreads entire heart(synchronistic) contraction.

3. Automicity (Autorhythmicity)otor neurons.

4. Length of Absolute Refractory Period - The absolute refractory period of cardiac muscle cells is much longer than skeletal muscle cells (250 ms vs. 2-3 ms).
5. nodal system - special autorhythmic cells of heart that initiate impulses contraction of entire heart
3.Mechanism of Contraction of Cardiac Muscle Fibers



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참고 자료

Human anatomy and physiology, 3rd edition, Elaine N. Marieb , 613-635
Essentials of human anatomy & physiology, 7th edition, Elaine N, Marieb,329-337