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Related Concept Videos

Compact Bone01:27

Compact Bone

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Most bones contain compact and spongy osseous tissue, but their distribution and concentration vary based on the bone's overall function.
Compact bone, also called cortical bone, is the denser, stronger of the two types of bone tissue. It is found under the periosteum and in the diaphyses of long bones, where it provides support and protection. The microscopic structural unit of compact bone is called an osteon, or haversian system. Each osteon is composed of concentric rings of calcified...
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Bone Formation by Endochondral Ossification01:24

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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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Bone Disorders01:29

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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.
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Spongy Bone01:09

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All bones comprise an outer layer of compact bone, and an interior made up of spongy bone tissue, also called cancellous or trabecular bone. In long bones, spongy bone tissue is mainly found in the interior of the epiphyses (broad ends of the bone).
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Osteoclasts in Bone Remodeling01:31

Osteoclasts in Bone Remodeling

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Osteoclasts are cells responsible for bone resorption and remodeling. They originate from hematopoietic progenitor cells present in the bone marrow. Numerous progenitor cells fuse to form multinucleated cells, each with 10-20 nuclei. A single osteoclast has a diameter of 150 to 200 µM. These cells have ruffled borders that break down the underlying bone tissue and release minerals such as calcium into the blood in bone resorption. Osteoclasts cling to bones with their ruffled edges during...
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Related Experiment Video

Updated: Jan 10, 2026

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[Osteochondritis dissecans: a rare localization].

R Giancola, C Borsotti, A Mondini

    Chirurgia Italiana
    |April 1, 1985
    PubMed
    Summary
    This summary is machine-generated.

    Osteochondritis can occur in unusual locations and may be diagnosed after trauma. Due to minimal pain, no specific treatment was given, with follow-up after eight months.

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    Area of Science:

    • Orthopedics
    • Radiology
    • Sports Medicine

    Background:

    • Osteochondritis, a condition affecting cartilage and underlying bone, typically presents with joint pain and swelling.
    • This case highlights a rare presentation of osteochondritis in a non-frequent anatomical location.
    • Diagnosis was incidentally made following a traumatic event.

    Observation:

    • The patient experienced minimal to no pain, a symptom typically associated with osteochondritis.
    • The absence of significant pain led to a decision against specific therapeutic interventions.
    • Clinical and radiographic assessments were conducted eight months post-diagnosis.

    Findings:

    • The study documents an unusual site of osteochondritis, underscoring the importance of considering atypical presentations.
    • Trauma served as the precipitating factor for diagnosis in this case.
    • The non-symptomatic nature of the condition influenced the management approach.

    Implications:

    • This case suggests that osteochondritis may present asymptomatically in non-frequent locations, challenging typical diagnostic pathways.
    • It emphasizes the role of trauma in uncovering occult osteochondritic lesions.
    • Further research into the natural history and optimal management of asymptomatic osteochondritis in rare sites is warranted.