Compact Bone Microscopic Anatomy

Questions and Answers

What does the central Haversian canal contain?

Nerves

Both blood vessels and nerves (correct)

Blood vessels

Bone cells

What is an osteon?

Haversian system

Circumferential lamellae extend around the entire circumference of the ______.

diaphysis

What are lamellae?

Weight-bearing, column-like matrix tubes Signup and view all the answers

What do periosteal blood vessels do?

Supply nutrients to the bone Signup and view all the answers

What are perforating Sharpey's fibers?

Connective tissue fibers that anchor the periosteum to the bone Signup and view all the answers

What connects blood vessels and nerves to the periosteum and central canal?

Perforating Volkmann's canal Signup and view all the answers

What are lacunae?

Small cavities that contain osteocytes Signup and view all the answers

What do canaliculi do?

Connect lacunae to each other and to the central canal Signup and view all the answers

What is the function of trabeculae?

Align along lines of stress and contain irregularly arranged lamellae Signup and view all the answers

What do osteogenic cells give rise to?

Osteoblasts Signup and view all the answers

What are osteoblasts responsible for?

Bone growth Signup and view all the answers

What is the role of osteocytes?

Monitor and maintain the mineralized bone matrix Signup and view all the answers

What do osteoclasts do?

Break down (resorb) bone matrix Signup and view all the answers

Study Notes

Compact Bone Microscopic Anatomy

Central Haversian Canal: Contains blood vessels and nerves, facilitating communication and nutrient supply within the bone.
Osteon (Haversian System): The fundamental structural unit of compact bone, comprising a central canal surrounded by concentric lamellae, enhancing strength and support.
Circumferential Lamellae: These layers encircle the diaphysis, providing resistance to twisting forces, maintaining structural integrity.
Lamellae: Composed of weight-bearing column-like matrix tubes, crucial for providing strength and structure to bone.
Periosteum: A fibrous membrane that covers the surface of bones, serving as an attachment point for tendons and ligaments, containing blood vessels and nerves.
Periosteal Blood Vessel: Supplies the periosteum and plays a role in nourishing the bone tissue.
Perforating Sharpey's Fibers: Connective tissue fibers that anchor the periosteum to the underlying bone, enhancing stability.
Endosteum: A thin layer lining the bony canals and covering trabeculae, involved in bone growth and repair.
Perforating (Volkmann's) Canal: Runs perpendicular to the central canal, connecting blood vessels and nerves from the periosteum to the central canal, facilitating communication.
Lacunae: Small cavities within the bone matrix that contain osteocytes, pivotal for monitoring bone health.
Canaliculi: Network of hairlike canals connecting lacunae and the central canal, allowing nutrient and waste transfer between osteocytes.
Trabeculae: Supportive structures within spongy bone, aligned according to stress lines, featuring irregular lamellae, osteocytes, and canaliculi, with capillaries supplying nutrients.
Osteogenic Cells: Stem cells located in the periosteum and endosteum, responsible for generating osteoblasts, essential for bone formation.
Osteoblasts: Bone-forming cells that synthesize the bone matrix, critical for growth and healing.
Osteocytes: Mature bone cells that maintain and monitor the mineralized bone matrix, ensuring bone health.
Osteoclasts: Cells responsible for bone resorption, breaking down the bone matrix to regulate calcium levels and repair bone.

Description

Explore the intricate details of compact bone through this quiz on its microscopic anatomy. Learn about essential structures such as the Haversian canal, osteons, and the periosteum, and understand their roles in bone health and function. Perfect for biology students seeking to deepen their understanding of skeletal anatomy.