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This animation introduces the most important organ systems of the human body.
It is easy to demonstrate how the heart works.
This lesson helps you understand the process of hearing.
Learn about the human sense organs and their functions and how to keep them healthy.
This lesson presents mutation types, their frequency and underlying causes.
Concave and convex lenses are used for the correction of shortsightedness and farsightedness.
The composition, operation and stamina of the human body and the way one feels greatly depend on...
The heart generates the electrical impulses necessary for its own operation. The graphic...