Koshas
These are five different angles to look at who we humans are (e.g., a physical body; an energy body; an emotional body; an intellect body; and a “bliss” body). These are five areas where our ego tends to get attached — when the ego doesn’t realize we are more than all this.
That we are also spiritual beings.
Here is a Yoga Journal article on the 5 Koshas; and here is a second Kosha article.