Under normal circumstances, bones stop growing when an individual has reached late teens or early twenties. Shortened fetal long bones (SFLB) can involve either the upper limb and/or the lower limb. The compact bone (or cortical), which is a layer of dense bone, is located below the periosteum; and underneath the compact bone, is the location of the spongy bone (also called trabecular or cancellous bone), which contains bone marrow responsible for the production of blood cells. the presence of shorted fetal long bones can be associated with an underlying skeletal dysplasia 1. It is generally an inherited condition, though it can be a symptom of other genetic disorders. Many facial bones, particularly the ones containing sinuses, are classified as irregular bones. Long bones develop mainly in length (such as the femur, tibia, fibula, radius, ulna, humerus); flat bones are characterized by having higher length and width than thickness (such as bones of the skull, shoulder blades, sternum); short bones are developed in a similar way in all three dimensions (such as the carpus and tarsus); and irregular bones are characterized by not having any dominant morphological element (such as in the case of the vertebrae). Flat bones serve as points of attachment for muscles and often protect internal organs. The humerus (/ ˈ h j uː m ər ə s /, plural: humeri) is a long bone in the arm that runs from the shoulder to the elbow.It connects the scapula and the two bones of the lower arm, the radius and ulna, and consists of three sections.The humeral upper extremity consists of a rounded head, a narrow neck, and two short processes (tubercles, sometimes called tuberosities). Subject. The lacrimal bone is the smallest bone of the face, and there are 2 such bones, each one forming a … Check off each bone as you label it. ... Use the list of bones provided to label the accompanying illustration of the skull. The axial skeleton forms the main frame of the body - the bones of the head and the trunk. A short bone is one that is cube-like in shape, being approximately equal in length, width, and thickness. Anatomy of a Flat Bone. We use cookies to ensure that we give you the best experience on our website. It is highly vascularized and contains red bone marrow. Have students read about the skeletal system below and take the two short answer quizzes. These bones tend to have more complex shapes, like the vertebrae that support the spinal cord and protect it from compressive forces. The sirloin is actually divided into several types of steak. Unlike long bones, short bones have a thin layer of compact bone, and are mostly filled with spongy bone. Watch this video to see the microscopic features of a bone. Human ear, organ of hearing and equilibrium that detects and analyzes sound by transduction and maintains the sense of balance. The trabeculae may appear to be a random network, but each trabecula forms along lines of stress to provide strength to the bone. Four types of cells are found within bone tissue: osteoblasts, osteocytes, osteogenic cells, and osteoclasts (Figure 6.9). Short Bones Short bones are shaped similarly to a cube. 1. The term “flat bone” is somewhat of a misnomer because, although a flat bone is typically thin, it is also often curved. Brachydactyly is known as shortening of the fingers and toes due to unusually short bones. Bone tissue (osseous tissue) differs greatly from other tissues in the body. A sesamoid bone is a small, round bone that, as the name suggests, is shaped like a sesame seed. Questions Multiple Choice a bone movement of the bone cells compose a small, round bone that, the... 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