Flat bones consist of spongy bone sandwiched between compact bone. is this statement true or false?1/1/2024 ![]() ![]() Each osteon consists of lamellae, which are layers of compact matrix that surround a central canal called the Haversian canal. They are aligned parallel to the long axis of the bone. Osteons are cylindrical structures that contain a mineral matrix and living osteocytes connected by canaliculi, which transport blood. Compact bone tissue consists of units called osteons or Haversian systems. It provides protection and strength to bones. Compact Bone TissueĬompact bone (or cortical bone) forms the hard external layer of all bones and surrounds the medullary cavity, or bone marrow. There are two types of bone tissue: compact and spongy. ![]() Osteocytes, the living cells of bone tissue, form the mineral matrix of bones. Bone Tissueīones are considered organs because they contain various types of tissue, such as blood, connective tissue, nerves, and bone tissue. They vary in number, shape, size, and position. They may be found between the flat bones of the skull. Sutural bones are small, flat, irregularly shaped bones. ![]() Sesamoid bones develop inside tendons and may be found near joints at the knees, hands, and feet.įigure 38.18 The patella of the knee is an example of a sesamoid bone. The patellae are sesamoid bones ( Figure 38.18). Sesamoid bones are small, flat bones and are shaped similarly to a sesame seed. Examples of irregular bones are the vertebrae, hip bones, and several skull bones. These bones may have short, flat, notched, or ridged surfaces. Irregular bones are bones with complex shapes. Examples of flat bones are the sternum (breast bone), ribs, scapulae (shoulder blades), and the roof of the skull ( Figure 38.16). For example, the bones of the wrist (carpals) and ankle (tarsals) are short bones ( Figure 38.16).įlat bones are thin and relatively broad bones that are found where extensive protection of organs is required or where broad surfaces of muscle attachment are required. Short bones, or cuboidal bones, are bones that are the same width and length, giving them a cube-like shape. Figure 38.17 The long bone is covered by articular cartilage at either end and contains bone marrow (shown in yellow in this illustration) in the medullary cavity. ![]()
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