What are bones made of. Bones help to support the body and to protect its organs.

What are bones made of. Its two principle components are collagen and calcium phosphate. Bones also make blood cells. Sep 11, 2025 · Bone marrow is either red or yellow, depending upon the preponderance of hematopoietic (red) or fatty (yellow) tissue. In humans the red bone marrow forms all of the blood cells with the exception of the lymphocytes, which are produced in the marrow and reach their mature form in the lymphoid organs. Wrist, complex joint between the five metacarpal bones of the hand and the radius and ulna bones of the forearm. . Bone tissue makes up the individual bones of the skeletons of vertebrates. Bones store important nutrients and minerals, too. The process takes two general forms, one for compact bone, which makes up roughly 80 percent of the skeleton, and the other for cancellous bone, including parts of the skull, the shoulder blades, and the ends of the long bones. The wrist is composed of eight or nine small, short bones (carpal bones) roughly arranged in two rows. Sep 2, 2025 · Bone is a rigid body tissue consisting of cells embedded in an abundant hard intercellular material. It is connected to the bone shaft by the epiphyseal cartilage, or growth plate, which aids in the growth of bone length and is eventually replaced by bone. Sep 2, 2025 · Bone is a rigid body tissue consisting of cells embedded in an abundant hard intercellular material. Sep 2, 2025 · Depending on how the protein fibrils and osteocytes of bone are arranged, bone is of two major types: woven, in which collagen bundles and the long axes of the osteocytes are randomly oriented, and lamellar, in which both the fibrils and osteocytes are aligned in clear layers. The human body has more than 200 bones. The outer layer is composed mostly of collagen and contains nerve fibres that cause pain when the tissue is damaged. Introduction Humans and many other animals have a skeletal system made up of hard pieces called bones. Sep 2, 2025 · Bone - Calcium, Phosphate, Hardness: Depending upon species, age, and type of bone, bone cells represent up to 15 percent of the volume of bone; in mature bone in most higher animals, they usually represent only up to 5 percent. Aug 26, 2025 · The human skeleton is the internal framework for the human body. The epiphysis is made of spongy cancellous bone covered by a thin layer of compact bone. Bones help to support the body and to protect its organs. Periosteum, dense fibrous membrane covering the surfaces of bones, consisting of an outer fibrous layer and an inner cellular layer (cambium). It consists of many individual bones and cartilages, as well as bands of fibrous connective tissue—the ligaments and the tendons—which serve in intimate relationship with the parts of the skeleton. qays rbkd rmbeu zlmi qwuh zedmrw xkp momgex zsvquucp ugto