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Encyclopedia > Lacuna (histology)
Lacuna (histology)
Section parallel to the surface from the body of the femur. X 100. a, Haversian canals; b, lacunae seen from the side; c, others seen from the surface in lamellae, which are cut horizontally.
Nucleated bone cells and their processes, contained in the bone lacunæ and their canaliculi respectively. From a section through the vertebra of an adult mouse.
Gray's subject #18 90

In histology, a lacuna is a small space containing an osteocyte in bone or chondrocyte in cartilage. The femur or thigh bone is the longest, most voluminous, and strongest bone of the human body. ... Haversian canals are a series of tubes around narrow channels formed by lamellae. ... Lamellae is a term for several very different biological and material structures. ... Canaliculi are small, microscopic canals between the various lacunae. ... A diagram of a thoracic vertebra. ... Feral mouse A mouse (Plural mice) is a mammal that belongs to one of numerous species of small rodents. ... A thin section of lung tissue stained with hematoxylin and eosin. ... An osteocyte, a star-shaped cell, is the most abundant cell found in bone. ... Chondrocytes (< Greek chondros cartilage + kytos cell) are the only cells found in cartilage. ...

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Bone

The Lacunæ are situated between the lamellæ, and consist of a number of oblong spaces. In an ordinary microscopic section, viewed by transmitted light, they appear as fusiform opaque spots. Each lacuna is occupied during life by a branched cell, termed a bone-cell or bone-corpuscle, the processes from which extend into the canaliculi

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Cartilage

The cells are contained in cavities in the matrix, called cartilage lacunæ; around these the matrix is arranged in concentric lines, as if it had been formed in sucessive portions around the cartilage cells. This constitutes the so-called capsule of the space. Each lacuna is generally occupied by a single cell, but during the division of the cells it may contain two, four, or eight cells.

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External links

  • Diagram at uwlax.edu
  • Photo at ohio-state.edu

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant. The public domain comprises the body of all creative works and other knowledge&#8212;writing, artwork, music, science, inventions, and others&#8212;in which no person or organization has any proprietary interest. ... An illustration from the 1918 edition Henry Grays Anatomy of the Human Body, commonly known as Grays Anatomy, is an anatomy textbook widely regarded as a classic work on human anatomy. ...

Bone and cartilage - edit
cartilage: chondroblast, chondrocyte, perichondrium, types (hyaline, elastic, fibrous), fibrocartilage callus, metaphysis

bone: ossification (intramembranous, endochondral, epiphyseal plate), cycle (osteoblast, osteoid, osteocyte, osteoclast), types (cancellous, cortical), regions (epiphysis, diaphysis), structure (osteon/Haversian system, Haversian canals, periosteum, Sharpey's fibres, lacunae, canaliculi, trabeculae, medullary cavity, bone marrow), shapes (long, short, flat, irregular, sesamoid) Grays illustration of a human femur, a typically recognized bone. ... Cartilage is a type of dense connective tissue. ... Cartilage is a type of dense connective tissue. ... A chondroblast is a cell, which originates from a mesenchymal stem cell and forms Chondrocytes, commonly known as cartilage cells. ... Chondrocytes (< Greek chondros cartilage + kytos cell) are the only cells found in cartilage. ... The perichondrium is a layer of dense connective tissue which surrounds the cartilage. ... Cartilage is type of dense connective tissue. ... Cartilage is type of dense connective tissue. ... Cartilage is type of dense connective tissue. ... A fibrocartilage callus is a temporary fibrocartilage callus which forms as bone attemps to heal a fracture. ... The metaphysis is the body of cartilage that separates the epiphyses and the diaphysis of long bones during growth. ... Grays illustration of a human femur, a typically recognized bone. ... Ossification is the process of bone formation, in which connective tissues, such as cartilage are turned to bone or bone-like tissue. ... Osteoblasts and osteoclasts on trabecula of lower jaw of calf embryo. ... Section of fetal bone of cat. ... The long bones are those that are longer than they are wide, and grow primarily by elongation of the diaphysis at an epiphysis at one end of the growing bone. ... An osteoblast (from the Greek words for bone and to build) is a mononucleate cell which produces a protein that produces osteoid. ... Osteoid is a protein mixture which is secreted by osteoblasts. ... An osteocyte, a star-shaped cell, is the most abundant cell found in bone. ... An osteoclast is a multinucleated cell that degrades and reabsorbs bone. ... Cancellous bone (or trabecular bone, or spongy bone) is a spongy type of bone with a very high surface area, found at the ends of long bones. ... Cortical bone is one of two main types of bone. ... For other uses of the word bone, see bone (disambiguation). ... The diaphysis is the main or mid section (shaft) of a long bone. ... Osteons (cross section) Osteons (also called Haversian system in honor of Clopton Havers) are predominant structures found in some lamellar or compact bone. ... Haversian canals are a series of tubes around narrow channels formed by lamellae. ... The periosteum is an envelope of fibrous connective tissue that is wrapped around the bone in all places except at joints (which are protected by cartilage). ... Canaliculi are small, microscopic canals between the various lacunae of ossified bone. ... Definition and etymology trabeculae. ... The medullary cavity is the central cavity of bone shafts where yellow marrow (adipose) is stored. ... Grays Anatomy illustration of cells in bone marrow. ... The long bones are those that grow primarily by elongation at an epiphysis at one end of the growing bone. ... Flat Bones. ... The irregular bones are such as, from their peculiar form, cannot be grouped as long bone, short bone, or flat bone. ... In anatomy, a sesamoid bone is a bone embedded within a tendon. ...


 
 

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