Find out about the different stages of a human life cycle and how we change ... Discover how the food gets into the body, through the digestive system. What happens to food in your mouth?

by cartilage cells in growth plates increasing in number. Zoe explains further changes to the human body throughout our lives, caused by injury, illness, changes in weight, childbirth and ageing.

Medically reviewed by Susan Bard, MD Hair typically grows an average of about half an inch (1.27 centimeters) each month.

Allometry and Relative Growth The term allometry ... He measured the body size and chela size of crabs at different developmental stages and plotted the relationship between the two on a chart.