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Calcium

A mineral needed for healthy teeth, bones, and other body tissues. It is the most common mineral in the body. A deposit of calcium in body tissues, such as breast tissue, may be a sign of disease.

PubMed Health Glossary
(Source: NIH - National Cancer Institute)

About Calcium

Calcium is a mineral found in many foods. The body needs calcium to maintain strong bones and to carry out many important functions. Almost all calcium is stored in bones and teeth, where it supports their structure and hardness.

The body also needs calcium for muscles to move and for nerves to carry messages between the brain and every body part. In addition, calcium is used to help blood vessels move blood throughout the body and to help release hormones and enzymes that affect almost every function in the human body... NIH - Office of Dietary Supplements

Terms to know

Bone
A living, growing tissue made mostly of collagen.
Bone Marrow
The soft, sponge-like tissue in the center of most bones. It produces white blood cells, red blood cells, and platelets.
Collagen
A fibrous protein found in cartilage and other connective tissue.
Connective Tissue
Supporting tissue that surrounds other tissues and organs. Specialized connective tissue includes bone, cartilage, blood, and fat.
Cortical Bone (Compact Bone)
Cortical bone is dense and compact. It forms the outer layer of the bone.
Periosteum
The outer membrane that surrounds a bone. It contains connective tissue, capillaries, nerves, and a number of types of cell, including osteoclasts. The periosteum plays an important role in bone repair and growth.
Trabecular Bone (Spongy Bone)
Trabecular bone makes up the inner layer of the bone and has a spongy, honeycomb-like structure.

Terms to know

Bone
A living, growing tissue made mostly of collagen....
Bone Marrow
The soft, sponge-like tissue in the center of most bones. It produces white blood cells, red blood cells, and...
Collagen
A fibrous protein found in cartilage and other connective tissue....
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