Human Body feed
Days
Many surface cells lining the stomach are renewed within roughly three to five days. That does not mean the entire stomach, or every cell in its lining, is replaced on that schedule.
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.