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Related Concept Videos

Bone Disorders01:29

Bone Disorders

6.8K
Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
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Changes in the Appendicular Skeleton with Age01:09

Changes in the Appendicular Skeleton with Age

4.0K
The upper and lower limb initially develops as a small bulge called a limb bud, which appears on the lateral side of the early embryo. The upper limb bud appears near the end of the fourth week of development, with the lower limb bud appearing shortly after.
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...
4.0K
Hormones and Bone Tissue01:17

Hormones and Bone Tissue

4.2K
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.
Hormones That Influence Osteoblasts and/or Maintain the Matrix
Several hormones are necessary for controlling bone growth and maintaining the bone matrix. The pituitary gland secretes growth hormone (GH), which, as its name implies, controls bone growth. This happens in several ways: first, it triggers chondrocyte...
4.2K
Essential Minerals for Bone Health01:31

Essential Minerals for Bone Health

7.1K
The minerals contained in all of the food we consume are essential for our organ systems. However, certain essential minerals, such as calcium, phosphorus, magnesium, manganese, and fluoride, largely affect bone health.
Calcium and Phosphorus
Calcium is a critical component of bones, especially in the form of calcium phosphate and calcium carbonate. Since the body cannot make calcium, it must be obtained from the diet. However, calcium cannot be absorbed from the small intestine without...
7.1K
Bone Formation by Intramembranous Ossification01:29

Bone Formation by Intramembranous Ossification

14.4K
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.
The process begins when mesenchymal cells in the embryonic skeleton gather together and differentiate into osteogenic cells, which then develop into ...
14.4K
Bone Formation by Endochondral Ossification01:24

Bone Formation by Endochondral Ossification

12.6K
Bone formation, or ossification, begins around the sixth to seventh week of embryonic development. Most bones develop from a cartilaginous template through the process of endochondral ossification. Cartilage formation begins when clusters of mesenchymal cells differentiate into chondrocytes. These chondrocytes proliferate rapidly and secrete an extracellular matrix that becomes encased in a membrane called the perichondrium. The resulting cartilage model provides a template that resembles the...
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Related Experiment Video

Updated: Mar 23, 2026

Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts
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Bone Health in Adolescence.

Dennis E Carey, Neville H Golden

    Adolescent Medicine: State of the Art Reviews
    |March 23, 2016
    PubMed
    Summary

    Preventing adult osteoporosis starts in youth by ensuring adequate calcium, vitamin D, and weight-bearing exercise. Early detection and lifestyle education are key for healthy bone development in adolescents.

    Area of Science:

    • Pediatric Endocrinology
    • Bone Metabolism
    • Adolescent Health

    Background:

    • Osteoporosis in children, though less common than in adults, can stem from genetic conditions (e.g., Osteogenesis Imperfecta), acquired diseases (e.g., Inflammatory Bowel Disease), or glucocorticoid therapy.
    • Establishing peak bone mass during adolescence is crucial for preventing adult osteoporosis.
    • Many adolescents do not meet recommended intake levels for calcium and vitamin D or engage in sufficient physical activity.

    Purpose of the Study:

    • To highlight the importance of establishing optimal bone health during adolescence for the prevention of adult osteoporosis.
    • To outline methods for detecting low bone mineral density (BMD) in at-risk youth.
    • To emphasize the role of nutrition, physical activity, and screening in adolescent bone health management.

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    Culturing and Measuring Fetal and Newborn Murine Long Bones
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    Author Spotlight: An Economic and Efficient Method for Quantitative Evaluation of Bone Microarchitecture in a Murine Osteoporosis Model
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    Main Methods:

    • Utilizing bone densitometry techniques such as dual-energy X-ray absorptiometry (DXA) and pQCT for BMD assessment.
    • Employing standard radiologic studies, including vertebral radiography, for high-risk children and adolescents.
    • Implementing bone health screenings that include calcium intake assessment and family history of osteoporosis.

    Main Results:

    • Adequate calcium and vitamin D intake, alongside regular weight-bearing exercise, are critical for adolescent bone development.
    • Bone densitometry and radiography can detect low BMD and identify at-risk individuals.
    • While universal vitamin D screening is not recommended, monitoring BMD in adolescents with chronic conditions is advised.

    Conclusions:

    • Optimizing nutrition (calcium, vitamin D) and physical activity in adolescents is essential for achieving peak bone mass and preventing future osteoporosis.
    • Routine bone health screening, including dietary and family history assessment, should be part of adolescent healthcare.
    • Bisphosphonates are indicated for severe pediatric osteoporosis, particularly Osteogenesis Imperfecta, under specialist care.