What types of tissues are found in the skeletal system?

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The skeletal system consists of a number of different types of tissue.  The most obvious ones are the bones themselves, the dense and rigid structures that support the body and the connective tissues that connect those structures.  The less obvious ones are the ones within the bones themselves including the marrow in which the body produces red blood cells and other important substances vital to the body's function.

Within the marrow there are actually two types, red and yellow.  At birth the marrow consists entirely of red marrow and as the body ages some of it is converted to yellow.  Red and most white blood cells as well as platelets are produced in the red marrow.  One of the other functions of marrow is producing stem cells of various types.

Cartilage is another tissue found in the skeletal system and a particularly specialized one.  Cartilage is critical in supporting and cushioning various parts of the skeletal system and is interesting in that it cannot heal itself in the ways that other tissues in the system can.

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How many kinds of tissues are in the skeletal system?

The skeletal system helps give structure, movement and protection to the bodies of animals with endoskeletons. It also functions in red blood cell production, storage of energy and storage of minerals. The tissue types of the skeletal system can vary from phylum to phylum; for example, there are "cartilaginous" fish such as sharks that do not have bone tissue. As most students ask about mammals, I will answer specifically about them.

Vertebrates such as mammals have skeletal systems made of a group of tissues called connective tissue. These are bone, cartilage, ligaments, and tendons. These tissues work together in the system, and work closely with other types of components such as blood and blood vessels, joints, nervous tissue, fat (adipose) tissue and muscle. Depending on what criteria you use to determine what to include in your list, your question about "how many kinds of tissues" will have different numerical answers. The types that are generally included are bone, cartilage, tendons and ligaments. See the attached links for information that might help in determining which other tissues you want to include in your list.

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