Height is also in large part governed by growth hormone - a hormone secreted by the pituitary.
Body growth, hence final height, is determined largely by the growth in length of the long bones. At birth, the ends of most long bones still consist of cartilage. Gradually, these begin to ossify, but a plate of growing cartilage remains at the bone ends. This is called the epiphysial, or growth, plate, and continues to produce new cartilage, which increases the length of the bone, before this too ossifies. At the end of the growing period, division of cartilage cells within the plate ceases, and the plate itself ossifies, and normal bone growth stops.