Length2.5 tenths m
2.5 hundredthsFire engine lengths
1.6Dollar bills
25,000Dust particles
Photo from Wikimedia Commons
Human Esophagus
The muscular tube that carries food from throat to stomach/The Human Body
The esophagus is a roughly 25 cm muscular tube that connects the pharynx to the stomach. It uses rhythmic contractions called peristalsis to push food downward, which is why you can swallow even while upside down. Two sphincter muscles at each end prevent backflow.
Measurements
Diameter (relaxed)2 hundredths m
50 millionthsSupertankers
666,667Smoke particles
1 hundredthsDwayne The Rock Johnsons
Diameter (during swallowing)4 hundredths m
2.5 tenthsKindle heights
133 trillionthsLight-seconds
Wall thickness4 thousandths m
64.5 millionHelium atoms
10,526Violet light wavelengths
Peristalsis speed4 hundredths m/s
370 millionthsPeregrine falcons
3.6 hundredthsWaddling penguins