What is the basic structural unit in compact bone quizlet?
What is the basic structural unit in compact bone quizlet?
Compact bone tissue is composed of repeating structural units called osteons, or haversian systems. Each osteon consists of concentric lamellae arranged around a central canal or haversian canal.
What units make up compact bone?
Compact bone tissue consists of units called osteons or Haversian systems. Osteons are cylindrical structures that contain a mineral matrix and living osteocytes connected by canaliculi, which transport blood. They are aligned parallel to the long axis of the bone.
What is the structural unit of cancellous bone?
Mature cortical and cancellous bone has a matrix of lamellated structure. The lamellae run parallel to the trabeculae of cancellous bone or concentrically surround the haversian canal and cortical bone, which forms an osteon, which is the functional unit of cortical bone.
What are the primary structures of a long bone?
A long bone has two parts: the diaphysis and the epiphysis. The diaphysis is the tubular shaft that runs between the proximal and distal ends of the bone. The hollow region in the diaphysis is called the medullary cavity, which is filled with yellow marrow.
What is the functional unit of compact bone?
osteon
The microscopic structural unit of compact bone is called an osteon, or Haversian system. Each osteon is composed of concentric rings of calcified matrix called lamellae (singular = lamella).
Where is compact bone found?
Compact bone is the denser, stronger of the two types of bone tissue ((Figure)). It can be found under the periosteum and in the diaphyses of long bones, where it provides support and protection.
What is a unit of bone called?
The basic microscopic unit of bone is an osteon (or Haversian system). Osteons are roughly cylindrical structures that can measure several millimeters long and around 0.2 mm in diameter. Each osteon consists of a lamellae of compact bone tissue that surround a central canal (Haversian canal).
What is the structure and function of a long bone?
Long bones function to support the weight of the body and facilitate movement. Long bones are mostly located in the appendicular skeleton and include bones in the lower limbs (the tibia, fibula, femur, metatarsals, and phalanges) and bones in the upper limbs (the humerus, radius, ulna, metacarpals, and phalanges).
What are the major types of bone markings?
There are three general classes of bone markings: (1) articulations, (2) projections, and (3) holes. As the name implies, an articulation is where two bone surfaces come together (articulus = “joint”).
What is the structural and functional unit of bone?
The osteon or haversian system /həˈvɜːr. ʒən/ (named for Clopton Havers) is the fundamental functional unit of much compact bone. Osteons are roughly cylindrical structures that are typically between 0.25 mm and 0.35 mm in diameter.