word for chest/heart + throat

What's the word that describes the "core" of a person, their spiritual core, the place where their soul resides— these kinds of concepts.

It pertains to the heart and throat area of the body. Like you can feel an extreme emotion in your heart but often in reality it manifests itself in your throat.

This area of the body can easily be told apart from the rest of the body in orcas and frogs, because it is uniquely coloured. Lots of other animals also have some kind of separation of this area from the rest of their body, to varying degrees.

I think there is at least one loan word that describes this area of the body, ideally with these kinds of connotations.

Solution 1:

I think the word you're looking for is gut as this meaning of the word makes it clear

Innermost emotional or visceral response

She felt in her gut that he was guilty.

[American Heritage Dictionary]

Gut feeling is actually aptly named, since within the intestinal lining is the enteric nervous system. This is where millions of neurons are hiding, and they "talk" to your brain via the vagus nerve. This nerve connects the abdomen (or your gut) to the brain's base and also travels through the chest (which is why "listen to your heart" is also truer than you think).