Human Body feed
In your mouth
A bite of bread begins undergoing chemical digestion while it is still in your mouth. Saliva supplies amylase, an enzyme that starts breaking down starch, while chewing fragments the food and mixes it with fluid before swallowing.
300
Babies have more separate skeletal pieces than adults, often described as about 300 bones compared with the usual adult count of 206. The newborn number is approximate because developing bone and cartilage are not always counted the same way.
1 cm
People are usually slightly taller after a night lying down because spinal discs regain fluid when unloaded. Around a centimeter is a useful rough illustration, not a fixed daily change for everyone.