The bladder appears egg shaped.
It's horizontal with two tubes attached from above and one below.
When the bladder fills with urine,
sensory nerves send impulses to the brain telling it the bladder is full.
The bladder expands.
Nerves like yellow branches stretch across the surface.
Their stem is attached at the pointed end of the bladder.
Sparks run along the stem toward the spinal column.
The nerves connect with other nerves in the spinal
cord to relay this information.
The nerves now turn green to represent
impulses coming back. The bladder deflates.
In turn, the brain sends impulses
back to the bladder instructing it to empty its contents.