The receptors for balance while standing are located in the inner ear, specifically within a structure called the vestibular system.

Here's a breakdown:

* Inner Ear: This is a fluid-filled chamber within the temporal bone of the skull.

* Vestibular System: This is a complex system within the inner ear responsible for detecting head movements and maintaining balance. It consists of:

* Semicircular Canals: Three fluid-filled loops that detect rotational movements of the head.

* Utricle and Saccule: Two fluid-filled sacs that detect linear acceleration and gravity.

These structures contain hair cells, which are specialized sensory cells that are stimulated by the movement of the fluid within the inner ear. This stimulation sends signals to the brain via the vestibular nerve, allowing us to perceive our orientation and maintain balance.