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What is a canaliculus in anatomy?
In anatomy, a canaliculus is a small passageway. Examples include: Bone canaliculus, a small channel found in ossified bone for nutrition for example in the Haversian canal. A small canal (anatomy) in bone which carries some structure (such as a nerve) through it.
What is an Osteon in anatomy?
osteon, the chief structural unit of compact (cortical) bone, consisting of concentric bone layers called lamellae, which surround a long hollow passageway, the Haversian canal (named for Clopton Havers, a 17th-century English physician).
What is an Trabeculae?
Definition of trabecula 1 : a small bar, rod, bundle of fibers, or septal membrane in the framework of a body organ or part. 2 : a fold, ridge, or bar projecting into or extending from a plant part especially : a row of cells bridging an intercellular space.
Where do osteocytes reside?
osteocyte, a cell that lies within the substance of fully formed bone. It occupies a small chamber called a lacuna, which is contained in the calcified matrix of bone. Osteocytes derive from osteoblasts, or bone-forming cells, and are essentially osteoblasts surrounded by the products they secreted.
What do Osteons look like?
Each osteon looks like a ring with a light spot in the center. The light spot is a canal that carries a blood vessel and a nerve fiber. The darker ring consists of layers of bone matrix made by cells called osteoblasts (check your textbook for an explanation of the difference between osteoblasts and osteocytes).
Where are Osteons located?
Compact bone
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.
How is the lacuna different from the Canaliculus?
The lacuna houses the osteocyte, while the canaliculus houses the cytoplasmic extension of the osteocyte.
Is the Metaphysis the growth plate?
The metaphysis is the neck portion of a long bone between the epiphysis and the diaphysis. It contains the growth plate, the part of the bone that grows during childhood, and as it grows it ossifies near the diaphysis and the epiphyses.
What is the function of the canaliculi?
The canaliculi are small channels that link together the lacunae as well as having a function of routing nutrients to osteocytes and expelling waste products. Lacunae are minute spaces that contain bone cells, otherwise known as the osteocytes. Canaliculi are found in both compact and spongy bone.
What is a canaliculi in anatomy?
Two functionally different structures in bone: Bone canaliculus,a small channel found in ossified bone for nutrition for example in the Haversian canal A small canal (anatomy) in bone which
What is the lacrimal canaliculi?
The lacrimal canaliculi, also known as the lacrimal ducts, are small anatomic structures that are part of the system that clears tears from the eyes. These small ducts connect two openings in the inner corners of the eyes to the nasolacrimal ducts, which empty tears into the nose.