Are the concentric rings in bone tissue?
Compact bone consists of closely packed osteons or haversian systems. The osteon consists of a central canal called the osteonic (haversian) canal, which is surrounded by concentric rings (lamellae) of matrix. Between the rings of matrix, the bone cells (osteocytes) are located in spaces called lacunae.
What are concentric rings called?
Concentric circles are circles with a common center. The region between two concentric circles of different radii is called an annulus. Any two circles can be made concentric by inversion by picking the inversion center as one of the limiting points.
What are concentric rings of bone matrix called?
The osteocytes are arranged in concentric rings of bone matrix called lamellae (little plates), and their processes run in interconnecting canaliculi. The central Haversian canal, and horizontal canals (perforating/Volkmann’s) canals contain blood vessels and nerves from the periosteum.
What are concentric rings of calcified matrix?
Each osteon is composed of concentric rings of calcified matrix called lamellae (singular = lamella). Running down the center of each osteon is the central canal, or Haversian canal, which contains blood vessels, nerves, and lymphatic vessels.
What tissue connects bone to bone usually found at a joint?
A tendon serves to move the bone or structure. A ligament is a fibrous connective tissue which attaches bone to bone, and usually serves to hold structures together and keep them stable.
What are the 5 major types of cells found in bone tissue?
What are the different types of bone cells?
- Osteoblast. This type of blood cell is within the bone. Its function is to form new bone tissue.
- Osteoclast. This is a very large cell formed in bone marrow.
- Osteocyte. This type of cell is within the bone.
- Hematopoietic. This type of cell is found in bone marrow.
Is attached to bones via tendons?
A tendon is a fibrous connective tissue which attaches muscle to bone. A tendon serves to move the bone or structure. A ligament is a fibrous connective tissue which attaches bone to bone, and usually serves to hold structures together and keep them stable.
What makes up the structure of compact bone?
An equilibrium between osteoblasts and osteoclasts maintains bone tissue. Compact bone consists of closely packed osteons or haversian systems. The osteon consists of a central canal called the osteonic (haversian) canal, which is surrounded by concentric rings (lamellae) of matrix.
What kind of bone has large open spaces?
Cancellous Bone. Cancellous bone has large open spaces (marrow spaces) and plates of bone called trabeculae. This photograph shows a section through a marrow space within a bone. Can you identify the bone marrow, trabeculae, osteocytes, and some adipocytes, that are in the bone marrow.
Which is lighter, cancellous bone or compact bone?
Spongy (cancellous) bone is lighter and less dense than compact bone. Spongy bone consists of plates (trabeculae) and bars of bone adjacent to small, irregular cavities that contain red bone marrow.
Can you identify the concentric lamellae central canal and lacunae?
This is a high power photo of a single Haversian system. Can you identify the concentric lamellae, central canal and the lacunae. Because of the way the bone is prepared for sectioning, you cannot see the osteocytes in the lacunae, only the spaces left behind.
