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Friday, 23 January 2015

The Human Heart

Human Heart


Task of the heart is to supply the oxygen and nutrient-rich blood body. This reaches the heart through regular contractions ("heartbeats").

Structure of the heart

The heart consists of four chambers, two atria and two so-called ventricles. The atria are connected to the chambers via the valves. The openings for the body and the pulmonary artery are also controlled via a flap.
From the heart chambers and heart valves

Cardiac cycle

In rhythmic, steady heartbeat filling phase and expulsion alternate regularly. This coordinated interplay is necessary to provide the body with enough blood.

Conduction

The heart works independent (autonomous): specialized muscle cells from the excitements and pass them on. This system is called Erregungsbildungs- and conduction system.