The Waterslide
One way only. Keep your arms inside the bolus.
Tour the set
Press the numbers and see what’s what.

Your guide to The Waterslide
The oesophagus is a muscular tube, about 25 centimetres long, from the back of the throat to the stomach. It doesn’t rely on gravity. Rings of muscle squeeze behind the bolus and relax in front of it, in a travelling wave called peristalsis.
That’s how astronauts swallow in orbit, and why you could, in principle, swallow standing on your head. We don’t recommend it. At the bottom, a ring of muscle (a sphincter) opens to let lunch into Acid Lake and closes behind it.
Swallowed food doesn’t fall to your stomach. Muscles squeeze it down in a wave called peristalsis, and it works upside down too.
Liquids take a second or two. A chewed mouthful takes a few seconds more.
Locals and staff
Nobody lives on a waterslide. The crew rides it once, on the way in.
Passport stamp
Your passport so far
Passport · Channel GG
0 of 9 stamps
Next stop down the gut · Stop 3
Acid Lake
The stomach. pH about 1.5 to 3.5. Pepsin starts on protein; spores ride right through.

