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Human Skull Replica Model measures 9×5.25×6.75 inches. Human Skull Replica Model is museum quality polyurethane cast. Made in the USA. Modern man, Homo sapiens. Old World origins from Homo erectus, 100,000 years ago. Human scientific name is homo sapiens. Our precise skull can be used as a teaching tool, museum skull exhibit, home decor skull or office decor skull.
The human skull is the bone structure that forms the head in the human skeleton. It supports the structures of the face and forms a cavity for the brain. Like the skulls of other vertebrates, it protects the brain from injury.
The skull consists of three parts, of different embryological origin, the neurocranium, the sutures, and the facial skeleton (also called the membraneous viscerocranium). The neurocranium (or braincase) forms the protective cranial cavity that surrounds and houses the brain and brainstem. The upper areas of the cranial bones form the calvaria (skullcap). The membranous viscerocranium includes the mandible.
The sutures are fairly rigid joints between bones of the neurocranium. The facial skeleton is formed by the bones supporting the face.
Except for the mandible, all of the bones of the skull are joined by sutures, synarthrodial (immovable) joints formed by bony ossification, with Sharpey’s fibres permitting some flexibility. Sometimes there can be extra bone pieces within the suture known as wormian bones or sutural bones. Most commonly these are found in the course of the lambdoid suture.
The human skull is generally considered to consist of twenty-two bones, eight cranial bones and fourteen facial skeleton bones. In the neurocranium these are the occipital bone, two temporal bones, two parietal bones, the sphenoid, ethmoid and frontal bones.
The bones of the facial skeleton are the vomer, two inferior nasal conchae, two nasal bones, two maxilla, the mandible, two palatine bones, two zygomatic bones, and two lacrimal bones.
Some sources count a paired bone as one, or the maxilla as having two bones (as its parts); some sources include the hyoid bone or the three ossicles of the middle ear but the overall general consensus of the number of bones in the human skull is the stated twenty-two.
The occipital, parietal, frontal, in the neurocranium, and the nasal, lacrimal, and vomer, in the facial skeleton are flat bones.
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|Dimensions||9 × 5.25 × 6.75 in|
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