A human heart and a cow's heart?

Cow hearts look very much the same as human hearts, only cow hearts tend to be a bit bigger. Thus size is the only difference between cow hearts and human hearts.

The structures are very similar and the relatively large size of a beef heart makes it easier to see the various structures.

They have things in common because they do a similar job but they are not the same. The nearest comparison to our own heart is the pigs heart.

same thing

The difference between a heart and a human heart is one heart is a shape, and the other is the heart in our chest that pumps blood all throughout our body.