How are Bones Formed?
Bones are a type of connective tissue that provides support and structure to the body. They are made up of a hard outer layer called the cortex and a softer inner layer called the medulla. Bones are formed through a process called ossification, which begins in the womb and continues until early adulthood.
The first step in ossification is the formation of a cartilage model of the bone. This cartilage model is gradually replaced by bone tissue, starting from the center of the bone and working outwards. The process of bone formation is controlled by a number of hormones, including growth hormone and parathyroid hormone.
Bones are constantly being remodeled throughout life. Old bone tissue is broken down by cells called osteoclasts, and new bone tissue is formed by cells called osteoblasts. This remodeling process helps to keep bones strong and healthy.
Related Questions:
- What is the difference between the cortex and the medulla of a bone?
- What is the process by which bones are formed called?
- When does ossification begin and end?
- What hormones control bone formation?
- What cells break down old bone tissue?
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