At what time is your body fully done growing? What substance do the blood vessels running throughout the bones carry?
The body never stops growing for as long as it lives. Blood vessels running in the bones carries just the same substances it delivers in the different parts of the body.
The body becomes fat when it eats too much, nails and hairs grow longer. If you mean growing tall which refers to height, this varies to male and females. Females stop growing tall as early as 15 years old while males still grow tall as late as 25 years old which is why some NBA players grow taller upon the time they are drafted.