is pisiform a sesamoid bone?
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The pisiform serves as an attachment for tendons and ligaments. As it is a sesamoid bone, it acts as a pulley that provides a smooth surface for the flexor carpi ulnaris tendon to glide over. The pisiform also forms part of the ulnar canal or as otherwise called the Guyon canal.
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The hip bone attaches the lower limb to the axial skeleton through its articulation with the sacrum. The right and left hip bones, plus the sacrum and the coccyx, together form the pelvis.
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Pivot joint, also called rotary joint, or trochoid joint, in vertebrate anatomy, a freely moveable joint (diarthrosis) that allows only rotary movement around a single axis. The moving bone rotates within a ring that is formed from a second bone and adjoining ligament.
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The cuneiform (from the Latin for 'wedge') bones are a set of three bones in the medial side of the foot that articulate with the navicular proximally and with the proximal surfaces of metatarsal 1-3 distally.
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The periosteum consists of dense irregular connective tissue. It is divided into an outer "fibrous layer" and inner "cambium layer" (or "osteogenic layer"). The fibrous layer contains fibroblasts, while the cambium layer contains progenitor cells that develop into osteoblasts.
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['Long Bones. The bones of the body come in a variety of sizes and shapes. ... ', 'Short Bones. Short bones are roughly cube shaped with vertical and horizontal dimensions approximately equal. ... ', 'Flat Bones. Flat bones are thin, flattened, and usually curved. ... ', 'Irregular Bones.']
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The major bones of the leg are the femur (thigh bone), tibia (shin bone), and adjacent fibula, and these are all long bones. The patella (kneecap) is the sesamoid bone in front of the knee.
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The four principal types of bones are long, short, flat and irregular. Bones that are longer than they are wide are called long bones.
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gomphosis joints. specialized peg/socket joint; where the peg is a tooth and the socket is the bones of the skull (mandible, incisive, maxilla); allow for slight movement during mastication. gomphosis joints are also called. periodontal ligaments.
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There are, in all, 33 irregular bones found here. The irregular bones are: the vertebrae, sacrum, coccyx, temporal, sphenoid, ethmoid, zygomatic, maxilla, mandible, palatine, inferior nasal concha, and hyoid.
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The facial bones of the skull form the upper and lower jaws, the nose, nasal cavity and nasal septum, and the orbit. The facial bones include 14 bones, with six paired bones and two unpaired bones. The paired bones are the maxilla, palatine, zygomatic, nasal, lacrimal, and inferior nasal conchae bones.
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Hip bone. The hip bone (os coxae, innominate bone, pelvic bone or coxal bone) is a large irregular bone, constricted in the center and expanded above and below. In some vertebrates (including humans before puberty) it is composed of three parts: the ilium, ischium, and the pubis.
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The pelvic girdle is a ring of bones attached to the vertebral column that connects the bones of the lower limbs to the axial skeleton. The pelvic girdle consists of the right and left hip bones. Each hip bone is a large, flattened, and irregularly shaped fusion of three bones: the ilium, ischium, and pubis.
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The coccyx, or tailbone, is formed by a fusion of four vertebrae. The bones of the human skeleton are divided into two groups. The appendicular skeleton includes all the bones that form the upper and lower limbs, and the shoulder and pelvic girdles. The axial skeleton includes all the bones along the body's long axis.
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The cranial bones, including the frontal, parietal, and sphenoid bones, cover the top of the head. The facial bones of the skull form the face and provide cavities for the eyes, nose, and mouth. Although it is not found in the skull, the hyoid bone is considered a component of the axial skeleton.
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Pygostyle describes a skeletal condition in which the final few caudal vertebrae are fused into a single ossification, supporting the tail feathers and musculature.
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The axial skeleton is derived from somites. The formation of the axial skeleton is more complex, however, than the simple subdivision of the paraxial mesoderm into somites and the medial displacement of sclerotomal cells within the somites to form primordia of the vertebrae.