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A power supply is not like a human heart.
the human heart is shaped like a upside down pear
They look like ovals.
the shape of the heart is like a cone
A human's heart is about 450g to 500g. It is the size of one tight fist and it weighs 10.5 ounces and is shaped like a cone.
a triangle
There are four chambers in a cow's heart. A cow's heart works just like a human's heart, as is with most other mammals.
it wights like an apple!
Beluga whales have only one heart like a human
A human heart differs from a pig's heart by its shape. The heart is shaped more like a trapezoid and the pig's heart is shaped more valentine. The orientation of both hearts are also different.
In reality, the human heart does not look like the traditional heart depicted on Valentines Day cards. The human heart has several cavities; both ventricles and atrium's. It also contains valves (pulmonary, aortic, mitral, tricuspid), which move the blood throughout (in and out of) the heart. The human heart is about the size of a human fist and, because the heart is a muscle with lots of blood supplied to it, it appears red like meat. Hope this helps!
The horse's heart is structured similarly to that of a human, just larger.