Changes

A '''heart''' is an [[organ]] that pumps [[blood]] via the [[circulatory system]] to the rest of the body. The heart is a marvelously crafted [[muscle|muscular]] pump and in humans, the heart of an [[embryo]] begins beating 21 days after [[conception]]. The [[Bible]] mentions the heart as a seat for our deepest emotions and wishes.

A '''heart''' is an [[organ]] that pumps [[blood]] via the [[circulatory system]] to the rest of the body. The heart is a marvelously crafted [[muscle|muscular]] pump and in humans, the heart of an [[embryo]] begins beating 21 days after [[conception]]. According to the [[Bible]]the heart as a seat for our deepest emotions and wishes.

Heart is situated inside the [[thorax]] in vertebrates and in human body is slightly to the left. Human heart consists of 4 main chambres, 2 [[atria]] and 2 [[ventricles]]. The right side of the heart receives blood from the body and pumps it to the lungs where it is oxygenated and returns to the left side of the heart. The left side of the heart pumps the oxygen carrying blood to the rest of the body.  

Heart is situated inside the [[thorax]] in vertebrates and in human body is slightly to the left. Human heart consists of 4 main chambres, 2 [[atria]] and 2 [[ventricles]]. The right side of the heart receives blood from the body and pumps it to the lungs where it is oxygenated and returns to the left side of the heart. The left side of the heart pumps the oxygen carrying blood to the rest of the body.