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Bone Disorders

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 Remodeling

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.

What is the Skeletal System?

What is the Skeletal System?

Osteoclasts in Bone Remodeling

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...

The Functions of the Skeletal System

The Functions of the Skeletal System

The most apparent functions of the skeletal system are support, protection, and movement. However, bone tissue also performs several other critical metabolic functions. For one, the bone matrix acts as a reservoir for a number of minerals important to the functioning of the body, especially calcium and phosphorus. These minerals, present in the bone tissue, can be released back into the bloodstream when required. Calcium ions, for example, are essential for muscle contractions and controlling...

Skeleton and Calcium Homeostasis

Skeleton and Calcium Homeostasis

Calcium is not only the most abundant mineral in bone but also the most abundant mineral in the human body. Calcium ions are needed for bone mineralization, tooth health, heart rate regulation and strength of contraction, blood coagulation, the contraction of smooth and skeletal muscle cells, and the regulation of nerve impulse conduction. The average calcium level in the blood is about 10 mg/dL. When the body cannot maintain this level, a person will experience hypo or hypercalcemia.

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Related Experiment Video

Updated: Jun 6, 2026

Cantilever Bending of Murine Femoral Necks

Cantilever Bending of Murine Femoral Necks

Published on: January 5, 2022

Osteoporosis and osteomalacia.

Linda A Russell¹

¹Weill Cornell School of Medicine, Hospital for Special Surgery, 535 East 70th Street, New York, NY 10021, USA. russelll@hss.edu

Rheumatic Diseases Clinics of North America

|November 25, 2010

Summary

As populations age, metabolic bone diseases and fractures rise. Optimizing fetal skeletal development, like ensuring adequate maternal vitamin D, may prevent future osteoporosis and osteomalacia.

Area of Science:

Gerontology
Bone Metabolism
Public Health

Background:

Aging populations face increasing rates of metabolic bone disease and fractures.
Early identification and intervention are crucial for managing at-risk individuals.
Ongoing research promises expanded treatment options for bone conditions.

Purpose of the Study:

To highlight the growing public health concern of metabolic bone diseases in aging populations.
To emphasize the need for proactive screening and treatment strategies.
To propose a novel approach focusing on fetal skeletal development for long-term bone health.

Main Methods:

Review of current research on metabolic bone diseases and osteoporosis.
Analysis of factors influencing peak bone mass development.

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A Novel in vivo Gene Transfer Technique and in vitro Cell Based Assays for the Study of Bone Loss in Musculoskeletal Disorders

A Novel in vivo Gene Transfer Technique and in vitro Cell Based Assays for the Study of Bone Loss in Musculoskeletal Disorders

Published on: June 8, 2014

Related Experiment Videos

Last Updated: Jun 6, 2026

Cantilever Bending of Murine Femoral Necks

Cantilever Bending of Murine Femoral Necks

Published on: January 5, 2022

A Novel in vivo Gene Transfer Technique and in vitro Cell Based Assays for the Study of Bone Loss in Musculoskeletal Disorders

A Novel in vivo Gene Transfer Technique and in vitro Cell Based Assays for the Study of Bone Loss in Musculoskeletal Disorders

Published on: June 8, 2014

Exploration of prenatal interventions, specifically maternal vitamin D supplementation.

Main Results:

Metabolic bone diseases and fracture incidence are projected to increase with an aging demographic.
Maximizing fetal skeleton development is identified as a key strategy for improving peak bone mass.
Improving maternal vitamin D levels during pregnancy shows potential for long-term skeletal health benefits.

Conclusions:

Addressing metabolic bone disease requires a multi-faceted approach, including early screening and advanced treatments.
Prenatal optimization of skeletal development offers a promising preventative strategy for lifelong bone health.
Focusing on maternal health, particularly vitamin D status, can significantly impact future population-level bone health outcomes, potentially mitigating osteoporosis and osteomalacia.