Bones are the rigid structures that make up the skeleton of vertebrate animals, including humans. They provide support, protect vital organs, and enable movement by serving as attachment points for muscles. Bones are composed mainly of collagen and minerals, primarily calcium phosphate, which give them strength and flexibility. In addition to their structural role, bones are also involved in the production of blood cells within the bone marrow, a process known as hematopoiesis. They store essential minerals, such as calcium and phosphorus, which are crucial for various bodily functions. Overall, bones play a vital role in maintaining the body's overall health and stability.