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Related Concept Videos

Bone Disorders01:29

Bone Disorders

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...
Bone Remodeling01:40

Bone Remodeling

Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
Essential Minerals for Bone Health01:31

Essential Minerals for Bone Health

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...
Bone Remodeling and Repair01:31

Bone Remodeling and Repair

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 bone...
Osteoclasts in Bone Remodeling01:31

Osteoclasts in Bone Remodeling

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 bone...
Hormones and Bone Tissue01:17

Hormones and Bone Tissue

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...

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Related Experiment Video

Updated: Jul 16, 2026

Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts
07:56

Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts

Published on: January 29, 2018

Race/ethnic differences in bone mineral density in men.

A B Araujo1, T G Travison, S S Harris

  • 1New England Research Institutes, Watertown, MA 02472, USA. aaraujo@neriscience.com

Osteoporosis International : a Journal Established As Result of Cooperation Between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA
|March 7, 2007
PubMed
Summary

Black men have higher bone mineral density (BMD) than Hispanic or White men. Hispanic men experience the steepest age-related BMD decrease, impacting fracture risk.

Related Experiment Videos

Last Updated: Jul 16, 2026

Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts
07:56

Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts

Published on: January 29, 2018

Area of Science:

  • Osteoporosis epidemiology in diverse male populations.
  • Skeletal health disparities among racial and ethnic groups.

Background:

  • Understudied epidemiology of osteoporosis in men and minority populations.
  • Need for research on skeletal health in diverse adult male demographics.

Purpose of the Study:

  • To compare bone mineral density (BMD) across Black, Hispanic, and White men.
  • To investigate age-related changes in BMD within these diverse groups.

Main Methods:

  • Random sampling of 1,209 Black, Hispanic, and White men aged 30-79 in Boston, MA.
  • Bone densitometry measurements (bone area, bone mineral content, BMD) at multiple skeletal sites.
  • Multiple regression analyses to determine race/ethnicity-specific means and age trends in bone density.

Main Results:

  • Black men exhibited significantly higher bone mineral content (BMC) and BMD compared to Hispanic and White men.
  • Femoral neck BMD was notably higher in Black men versus Hispanic and White men.
  • Age-related declines in BMC and BMD were most pronounced in Hispanic men.

Conclusions:

  • Observed differences in BMC and BMD may explain variations in hip fracture rates among racial/ethnic groups.
  • The accelerated age-related BMD loss in Hispanic men warrants particular attention for fracture prevention strategies.