Question

each individual osteocyte or chondrocyte resides within a little space called a(n)______
multiple choice
medullary cavity
epiphyseal line
endosteum
lacuna
central canal

Explanation:

• Medullary cavity: It is a large, central cavity in the diaphysis (shaft) of long bones that contains bone marrow. It is not the small space where osteocytes or chondrocytes reside.
• Epiphyseal line: This is a remnant of the epiphyseal plate (growth plate) in adults. It has no relation to the space for osteocytes or chondrocytes.
• Endosteum: It is a thin vascular membrane of connective tissue that lines the inner surface of the bony tissue that forms the medullary cavity of long bones. Not the space for the cells in question.
• Lacuna: In bone (where osteocytes are) and cartilage (where chondrocytes are), lacunae are small cavities that house these cells. Osteocytes in bone lacunae maintain bone tissue, and chondrocytes in cartilage lacunae are involved in cartilage maintenance and growth.
• Central canal: Part of the Haversian system (osteon) in compact bone. It contains blood vessels and nerves, not the cells (osteocytes are in lacunae around the central canal).

Answer:

Lacuna