![]() The World Health Organisation states that more people die from heart diseases every year than from any other cause. When the heart can’t do its job, people’s lives are at risk. The heart continues carrying out this same vital job throughout our lives. Thus, the first organ system to develop is the heart, blood and circulatory system, so that nutrients and waste can be transported throughout the growing embryo. The cells also produce waste that they need to get rid of. But as the cells divide and multiply to form a growing ball, it soon becomes impossible for nutrients to reach all the cells efficiently without help. When an embryo is made up of only a very few cells, each cell can get the nutrients it needs directly from its surroundings. The heart is the first organ to form during development of the body. ![]()
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