Final answer:
The small spaces between concentric lamellae containing osteocytes are called lacunae. These lacunae are critical for osteocyte function and are interconnected by canaliculi to allow for nutrient and waste exchange.
Step-by-step explanation:
The small spaces between concentric lamellae that contain osteocytes are called lacunae. These lacunae are found at the borders of adjacent lamellae and play a crucial role in bone physiology. Osteocytes, which are mature bone cells, reside within these lacunae. The lacunae are interconnected by tiny channels called canaliculi, which facilitate the transport of nutrients to the osteocytes and the removal of wastes. This arrangement ensures the survival and function of the cells within the dense bone matrix.
The structure of compact bone is highly organized into units known as osteons or Haversian systems. Each osteon is composed of concentric rings of calcified matrix called lamellae. At the center of each osteon is the Haversian canal, containing blood vessels, nerves, and lymphatic vessels, all of which are essential for maintaining healthy bone tissue.