【實用音樂app】Heart Encyclopedia|最夯免費app

The heart is a muscular organ that is responsible for pumping blood throughout the blood vessels by repeated, rhytmic contractions.

The human embryonic heart begins beating at around 21 days after conception.

On this great Encyclopedia, you will find all abou Heart, Structure, Functioning, etc….

Among the topics in this encyclopedia includes:

- Heart Development

- Structure

- Functioning

- History

- Discovery

- Cardiology

This beautiful encyclopedia, is part of several volumes and issues

which can be found on our website:

www.encyclopediasuite.com

And others in many different languages as well.

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