NEET PG DENTAL EXAM

Detailed explanation-1: -Lacunae-small spaces between the lamellae in the trabeculae that house osteocytes (bone cells). So, the answer is: Compact bone contains a, b, c, and d (Haversian systems, Haversian canals, lamellae, and lacunae). Cancellous bone contains c and d (lamellae and lacunae).

Detailed explanation-2: -Mature bones are made up of three types of tissue: compact tissue (the hard outer portion of most bones); cancellous tissue (spongy tissue inside the bones that contains bone marrow, which makes blood cells); and subchondral tissue (smooth bone tissue of the joints).

Detailed explanation-3: -compact bone, also called cortical bone, dense bone in which the bony matrix is solidly filled with organic ground substance and inorganic salts, leaving only tiny spaces (lacunae) that contain the osteocytes, or bone cells.

Detailed explanation-4: -Cancellous bone (also known as spong bone) is spongy, soft and found within flat bones and at the ends of long bones. It contains the bone marrow, fat and blood vessels within it.