Bones are considered organs because they contain which combination of tissues?

Bones are considered organs because they contain which combination of tissues?

• A. Bone tissue, nervous tissue, cartilage, fibrous connective tissue, muscle and epithelial cells
• B. Only bone tissue
• C. Only cartilage and bone
• D. Muscle tissue only

Answer: (A)

Bones are organs because they’re made of several tissue types working together to perform their functions. The main supporting tissue is bone tissue, but nerves run through the periosteum and bone to provide sensation and regulate remodeling; articular cartilage coats joint surfaces to reduce friction; the outer covering and inner lining involve fibrous connective tissue in the periosteum and related structures; muscles attach to bones and their contractions enable movement; and epithelial components line the vessels and marrow cavities inside the bone. This combination of bone tissue plus nervous, cartilage, connective, muscle, and epithelial tissues is what makes bone an organ rather than a single tissue.

Bones are organs because they’re made of several tissue types working together to perform their functions. The main supporting tissue is bone tissue, but nerves run through the periosteum and bone to provide sensation and regulate remodeling; articular cartilage coats joint surfaces to reduce friction; the outer covering and inner lining involve fibrous connective tissue in the periosteum and related structures; muscles attach to bones and their contractions enable movement; and epithelial components line the vessels and marrow cavities inside the bone. This combination of bone tissue plus nervous, cartilage, connective, muscle, and epithelial tissues is what makes bone an organ rather than a single tissue.