While every effort has been made to follow citation style rules, there may be some discrepancies.Please refer to the appropriate style manual or other sources if you have any questions.
You are watching: Spongy, porous bone tissue
Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login).
Feedback TypeSelect a type (Required)Factual CorrectionSpelling/Grammar CorrectionLink CorrectionAdditional InformationOther
Our editors will review what you’ve submitted and determine whether to revise the article.
Join jonathanlewisforcongress.com”s Publishing Partner Program and our community of experts to gain a global audience for your work!
Cancellous bone, also called trabecular bone or spongy bone, light, porous bone enclosing numerous large spaces that give a honeycombed or spongy appearance. The bone matrix, or framework, is organized into a three-dimensional latticework of bony processes, called trabeculae, arranged along lines of stress. The spaces between are often filled with marrow and blood vessels.
See more: The Supreme Happiness Of Life Is The Conviction That We Are Loved.
Cancellous bone makes up about 20 percent of the human skeleton, providing structural support and flexibility without the weight of compact bone. It is found in most areas of bone that are not subject to great mechanical stress. It makes up much of the enlarged ends (epiphyses) of the long bones and is the major component of the ribs, the shoulder blades, the flat bones of the skull, and a variety of short, flat bones elsewhere in the skeleton. Cancellous bone is usually surrounded by a shell of compact bone, which provides greater strength and rigidity. The open structure of cancellous bone enables it to dampen sudden stresses, as in load transmission through the joints. Varying proportions of space to bone are found in different bones according to the need for strength or flexibility. Cancellous bone also has a relatively high level of metabolic activity.
Cancellous bone can develop into compact bone through the action of bone-forming cells called osteoblasts. It is in that manner that all long bones develop in the embryo. The osteoblasts deposit new bone matrix in layers around the trabeculae, which thus enlarge at the expense of the spaces between them. Eventually the spaces are eliminated, and immature compact bone is produced. See also bone formation.
See more: Energy, Enzymes, A _____ Accelerates A Chemical Reaction In A Cell.
This article was most recently revised and updated by Kara Rogers, Senior Editor.
