What are the small holes in bones called?
Remember that organs, including bones, need three connections: blood vessels (both arteries and veins), lymphatics, and nerves. These structures enter the bone through little holes called foramina. A hole specifically for blood vessels is called a nutrient foramen (the singular form of foramina).
What is the name of the cavity that contains an osteocyte?
Each osteocyte is located in a small cavity in the bone tissue called a lacuna (lacunae for plural). Osteocytes maintain the mineral concentration of the matrix via the secretion of enzymes.
Why are there small holes in bones?
Bones have tiny holes in their surface which allow the blood vessels and nerves to get in and out, thus to connect with blood circulation or the central nervous system, respectively.
What is a fossa on a bone?
Fossa – A shallow depression in the bone surface. Here it may receive another articulating bone or act to support brain structures. Examples include trochlear fossa, posterior, middle, and anterior cranial fossa.
What is the space that an osteocyte rests in?
In mature bones, osteocytes and their processes reside inside spaces called lacunae (Latin for a pit) and canaliculi, respectively. Osteocytes are simply osteoblasts trapped in the matrix that they secrete.
What are lacunae in bone?
The bonelacunaasmallcavitywithinthebonematrix,containingan osteocyte.
What are the rings called that osteocytes form?
The osteocytes are arranged in concentric rings of bone matrix called lamellae (little plates), and their processes run in interconnecting canaliculi.
Where does a fossa live?
island of Madagascar Fossas are the largest carnivores on the island of Madagascar, where they feed on a varieties of mammals, including lemurs. They typically hunt and live alone. Like most species on Madagascar, fossas are threatened by habitat loss.
What is a condyle in a bone?
Medical Definition of condyle : an articular prominence of a bone —used chiefly of such as occur in pairs resembling a pair of knuckles (as those of the occipital bone for articulation with the atlas, those at the distal end of the humerus and femur, and those of the lower jaw) — see lateral condyle, medial condyle.
What is lacuna in bone?
lacuna luh-KOO-nuh noun. 1 : a blank space or a missing part : gap; also : deficiency. 2 : a small cavity, pit, or discontinuity in an anatomical structure. Examples: The osteocyte is a cell that is isolated in a lacuna of bone.
Why do bones have holes?
Bones have tiny holes in their surface which allow the blood vessels and nerves to get in and out, thus to connect with blood circulation or the central nervous system, respectively.
What are lamellae in bone?
Lamellar bone represents the main type of bone in a mature skeleton. It is characterized by an orderly arrangement of collagen bundles and their cells (fig. 8a-c). Osteocytic lacunae in lamellar bone are uniform and regularly distributed and contain relatively monomorphic cells (fig. 7b).
What is the site of osteocytes?
Osteocytes are most often described as terminally differentiated osteoblasts that reside in small pockets termed lacunae, located deep within mineralized bone.
What is meant by fossa?
Definition of fossa (Entry 1 of 2) : an anatomical pit, groove, or depression.
What is tubercle?
A tubercle is a small rounded point of a bone. It also refers to a nodule attached to bone, mucous membrane (moist layer lining parts of the body), or skin.
What is condyle and epicondyle?
The condyle is smooth and round whereas epicondyle is rough. Epicondyle is a projection on the condyle. The main difference between condyle and epicondyle is that condyle forms an articulation with another bone. whereas epicondyle provides sites for the attachment of muscles.
What is lacunae and lamellae?
Lacuna : It is a cavity or space in side the cell or bone . Lamella : It is a thin continuous layer or membrane like thylakoid membrane .
Where are living osteocytes found?
Between the rings of matrix, the bone cells (osteocytes) are located in spaces called lacunae. Small channels (canaliculi) radiate from the lacunae to the osteonic (haversian) canal to provide passageways through the hard matrix.
What means condyle?
Definition of condyle : an articular prominence of a bone especially : one resembling a pair of knuckles.
What is Caseous tubercle?
A tubercle usually consists of a centre of dead cells and tissues, cheeselike (caseous) in appearance, in which can be found many bacilli. This centre is surrounded by radially arranged phagocytic (scavenger) cells and a periphery containing connective tissue cells.
What is a groove in anatomy?
A narrow elongated depression or furrow on any surface. See also: sulcus.
What is an epicondyle?
An epicondyle is a special feature found on long bones. It serves as a point of attachment for tendons and ligaments. Tendons connect muscle to bone while ligaments connect bones to other bones. As with all bones, an epicondyle has the possibility of breaking.
What is the condyle?
Definition of condyle : an articular prominence of a bone especially : one resembling a pair of knuckles.
What is a lamella in bone?
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 do you mean by Montmorency?
Definition of Montmorency : a cherry that is grown commercially for its bright red sour fruit also : the fruit.
What is meant by malleolus?
malleolus. / (məˈliːələs) / noun plural -li (-ˌlaɪ) either of two rounded bony projections of the tibia and fibula on the sides of each ankle joint.
What is Liquefactive?
Liquefactive necrosis is characterized by softening of the necrotic tissue to the point at which it transforms into a pastelike mush or watery debris.
What is a tubercle in a bone?
A tubercle is a small rounded point of a bone. It also refers to a nodule attached to bone, mucous membrane (moist layer lining parts of the body), or skin.
What is the difference between epicondyle and condyle?
The condyle is smooth and round whereas epicondyle is rough. Epicondyle is a projection on the condyle. The main difference between condyle and epicondyle is that condyle forms an articulation with another bone. whereas epicondyle provides sites for the attachment of muscles.
Who was Montmorency Class 9?
Montmorency was the pet dog of the narrator and his two friends. He made a complete nuisance of himself. He sat down on things which had to be packed, pushed his nose into Harris or George's hand whenever they reached out for anything, put his leg into the jam, played with a teaspoon and pretended the lemons were rats.