Which bone tissue aligns along lines of stress to resist it, has no osteons, contains irregular lamellae and osteocytes interconnected by canaliculi, and is nourished by capillaries in the endosteum?

Which bone tissue aligns along lines of stress to resist it, has no osteons, contains irregular lamellae and osteocytes interconnected by canaliculi, and is nourished by capillaries in the endosteum?

• A. Trabeculae
• B. Osteon
• C. Lamella
• D. Periosteum

Answer: (A)

Trabecular (spongy) bone is organized as a lattice of thin plates, called trabeculae, that align with lines of mechanical stress to resist bending and compression while keeping the bone light. This structure lacks osteons—the circular units of compact bone—so the tissue within trabeculae is composed of irregular lamellae with osteocytes housed in lacunae and connected by canaliculi for communication and nutrient exchange. Nourishment comes from capillaries in the endosteum lining the interior surfaces and the surrounding marrow spaces; nutrients diffuse through the endosteal network and canaliculi to sustain the osteocytes.

Trabecular (spongy) bone is organized as a lattice of thin plates, called trabeculae, that align with lines of mechanical stress to resist bending and compression while keeping the bone light. This structure lacks osteons—the circular units of compact bone—so the tissue within trabeculae is composed of irregular lamellae with osteocytes housed in lacunae and connected by canaliculi for communication and nutrient exchange. Nourishment comes from capillaries in the endosteum lining the interior surfaces and the surrounding marrow spaces; nutrients diffuse through the endosteal network and canaliculi to sustain the osteocytes.