Well done !Originally Posted by Moy
the hollow, muscular organ in a vertebrate animal that receives blood from the veins and pumps it through the arteries by alternate dilation and contraction
The heart is of course just a pump, found in animals with a circulatory system, including all vertebrates ( animals each having a backbone / spine ). It usually weighs 250 - 300 g in females and 300 - 350 g in males. We all know it's long been used as a symbol of the spiritual, emotional, and moral core of humans, and now you know ... men have bigger hearts
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Some invertebrates also have hearts, usually just a muscular tube - yes, even mosquitoes
