[varyherb]

When I think about the digestive tract, I wonder—is the human body topologically equivalent to a torus?

[dsamarin]

It depends on the minimum size of the what you will consider a hole. Check out the video from VSauce on YouTube about how many holes a human has.

https://youtu.be/egEraZP9yXQ

[oh_sigh]

Specifically a g-holed torus, since the digestive tract isn't the only hole through the human body. At the very least, the mouth and ear are connected forming another hole.