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Related Concept Videos

Sutures of the Skull01:22

Sutures of the Skull

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The human skull is composed of several bones that come together to protect the brain and support the structures of the face. The junctions where these bones meet are called sutures.
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The lateral view of the cranium is dominated by temporal, sphenoid, and ethmoid bones.
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Hormones and Bone Tissue01:17

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The endocrine system produces and secretes hormones, which interact with the skeletal system. These hormones control bone growth, maintain bone once it is formed, and remodel it.
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The superior view of the cranium shows the frontal and paired parietal bones.
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Intramembranous ossification is one of the two processes involved in the development of bones within an embryo. The flat bones of the face, most of the cranial bones, and the clavicles are formed via this process. During intramembranous ossification, the bones develop directly from sheets of undifferentiated mesenchymal connective tissue.
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Pituitary-bone connection in skeletal regulation.

Mone Zaidi, Li Sun, Peng Liu

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    Pituitary hormones like growth hormone (GH) and others impact bone directly, not just target tissues. This discovery offers new therapeutic avenues for bone diseases such as osteoporosis.

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    Area of Science:

    • Endocrinology
    • Bone Biology
    • Metabolic Bone Diseases

    Background:

    • Pituitary hormones were traditionally viewed as having limited, specific functions on target tissues.
    • Recent findings reveal pituitary hormones and their receptors are present in the skeleton, indicating broader roles.

    Purpose of the Study:

    • To review the direct effects of key pituitary hormones on bone tissue.
    • To explore the implications of these skeletal actions for understanding and treating metabolic bone diseases.

    Main Methods:

    • Literature review and synthesis of existing research on pituitary hormones and bone.
    • Discussion of specific pituitary hormones including growth hormone (GH), follicle stimulating hormone (FSH), thyroid stimulating hormone (TSH), adrenocorticotrophic hormone (ACTH), prolactin, oxytocin, and arginine vasopressin (AVP).

    Main Results:

    • Evidence suggests direct interactions between multiple pituitary hormones and skeletal tissues.
    • The presence of hormone receptors in bone indicates a direct signaling pathway.

    Conclusions:

    • Pituitary hormones exert direct, ubiquitous functions on the skeleton, challenging traditional views.
    • Understanding these direct skeletal actions opens new therapeutic opportunities for metabolic bone diseases, particularly osteoporosis.