Human Body feed
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.
20%
The adult brain represents roughly 2% of body weight but accounts for about 20% of the body's resting energy use. That comparison describes a typical resting adult, not a fixed share of every person's daily calorie expenditure.