what are lamellae
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lamellae  (general anatomy) lamella | lamellae [plural] | lamellas [plural] | middle lamella [synonym, sense-specific] | lamellar [derived] a thin layer, plate, or membrane, especially any of the calcified layers of which bone is formed | [botany] any of the spore-bearing gills of a ... (25 of 291 words, 6 definitions, pronunciations)
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- adjective, lamer, lamest. 1. crippled or physically disabled, especially in the foot or leg so as to limp or walk with difficulty. 2. impaired or disabled through defect or injury: a lame arm. 3. weak; inadequate; unsatisfactory; clumsy: a lame excuse.
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Dinoflagellate The dinoflagellate cell is banded by a median or coiled groove, the annulus, which contains a flagellum. A longitudinal groove, the sulcus, extends from the annulus posteriorly to the point at which a second flagellum is attached. The nuclei of dinoflagellates are larger than those of other eukaryotes.
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flame cell A hollow cell in the excretory system of certain invertebrates, including flatworms and rotifers, containing a tuft of rapidly beating cilia that serve to propel waste products into excretory tubules.lame cell. n. 1. (Zoology) an organ of excretion in flatworms: a hollow cup-shaped cell containing a bunch of cilia, whose movement draws in waste products and wafts them to the outside through a connecting tubule.
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Lameness (equine) Lameness is an abnormal gait or stance of an animal that is the result of dysfunction of the locomotor system. In the horse, it is most commonly caused by pain, but can be due to neurologic or mechanical dysfunction.Lameness is a common veterinary problem in racehorses, sport horses, and pleasure horses.ameness is an abnormal gait or stance of an animal that is the result of dysfunction of the locomotor system. In the horse, it is most commonly caused by pain, but can be due to neurologic or mechanical dysfunction.
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- These systems have viscoelastic. properties and shear thin when applied to skin. • A lamellar gel network can be defined as a network formed by bi-. layer sheets where the alkyl chains in the bi-layers are essentially in. a frozen non-melted state. This type of lamellar phase is also called. alpha phase or alpha gel.
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Definitions &Translations Lamella. A lamella is a thin plate-like structure, often one amongst many lamellae very close to one another, with open space between.Aside from respiratory organs, they appear in other biological roles including filter feeding, the traction surfaces of geckos, and chloroplast membranes where high permeability is important.amella. A lamella is a thin plate-like structure, often one amongst many lamellae very close to one another, with open space between.
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- Lamellae which run parallel to the surface of the bone are visible both on the outer, convex surface of the bone (circumferential lamellae) and on the inner, concave surface of the bone facing the marrow cavity (endosteal lamellae).
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Haversian canal In mature compact bone most of the individual lamellae form concentric rings around larger longitudinal canals (approx. 50 µm in diameter) within the bone tissue. These canals are called haversian canals. Haversian canals are contained within osteons, which are typically arranged along the long axis of the bone in parallel to the surface. The canals and the surrounding lamellae (8-15) form the functional unit, called a haversian system or osteon.
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Lacuna (histology) The Lacunae are situated between the lamellae, 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 an osteocyte, bone-cell or bone-corpuscle.Lacunae are connected to one another by small canals called canaliculi.n 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 an osteocyte, bone-cell or bone-corpuscle.
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Choanoflagellate From Wikipedia, the free encyclopedia. The choanoflagellates are a group of free-living unicellular and colonial flagellate eukaryotes considered to be the closest living relatives of the animals. Choanoflagellates are collared flagellates having a funnel shaped collar of interconnected microvilli at the base of a flagellum.
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Lamellipodium The lamellipodium (plural lamellipodia) (from Latin Lamina - thin sheet, pod - foot) is a cytoskeletal protein actin projection on the leading edge of the cell.It contains a quasi-two-dimensional actin mesh; the whole structure propels the cell across a substrate (Alberts, et al., 2002).Within the lamellipodia are ribs of actin called microspikes, which, when they spread beyond the lamellipodium frontier, are called filopodia (Small, et al., 2002).rp2/3 complexes are present at microfilament-microfilament junctions in lamellipodia, and help create the actin meshwork. Arp 2/3 can only join onto previously existing microfilaments, but once bound it creates a site for the extension of new microfilaments, which creates branching (Weed, et al., 2000).
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Ligule A ligule can also be defined as a membrane-like tissue or row of delicate hairs typically found in grasses at the junction of the leaf sheath and blade. The ligule appears to be a continuation of the leaf sheath and encircles or clasps the stem as does the leaf sheath. The three basic types of ligules are: membranous, a fringe of hairs (ciliate), and absent or lacking. Most grasses have ligules, and the shape, length, and appearance of the ligule margin provide consistent characters for separating genera and some species of grasses. In grass-like plants such as sedges (Cyperaceae) and rushes (Juncaceae), ligules are usually absent or poorly developed.
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Osteon 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).
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Parallax Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight, and is measured by the angle or semi-angle of inclination between those two lines.he nearest star to the Sun (and thus the star with the largest parallax), Proxima Centauri, has a parallax of 0.7687 ± 0.0003 arcsec. This angle is approximately that subtended by an object 2 centimeters in diameter located 5.3 kilometers away.
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- However instead of crests and troughs, longitudinal waves have compressions and rarefactions. Definition 1: Compression. A compression is a region in a longitudinal wave where the particles are closest together. A rarefaction is a region in a longitudinal wave where the particles are furthest apart. As seen in Figure 1, there are regions where the medium is compressed and other regions where the medium is spread out in a longitudinal wave. The region where the medium is compressed is known as a compression and the region where the medium is spread out is known as a rarefaction.
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Maxilla The maxilla (plural: maxillae /mækˈsɪliː/) in animals is the upper jawbone formed from the fusion of two maxillary bones. The upper jaw includes the frontal portion of the palate of the mouth. The two maxillary bones are fused at the intermaxillary suture. This is similar to the mandible (lower jaw), which is also a fusion of two mandibular bones at the mandibular symphysis.
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Definitions &Translations The cotyledon of grasses and many other monocotyledons is a highly modified leaf composed of a scutellum and a coleoptile. The scutellum is a tissue within the seed that is specialized to absorb stored food from the adjacent endosperm.
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- The Lacunae are situated between the lamellae, 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 an osteocyte, bone-cell or bone-corpuscle.Lacunae are connected to one another by small canals called canaliculi.he Lacunae are situated between the lamellae, and consist of a number of oblong spaces. In an ordinary microscopic section, viewed by transmitted light, they appear as fusiform opaque spots.
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- Best Answer: Structure of an osteon 1). lamella: concentric ring 2). haverson’s canal: runs through the core. 3). perforating canals: Connect the Haverson’s canals 4). lacuna: contain osteocytes (mature bone cells) Types of osteocytes i). osteoblasts: build bone ii). osteoclasts: consume or remove bone. Source(s): .
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Osteon Histology of compact bone showing osteon. Each osteon consists of concentric layers, or lamellae, of compact bone tissue that surround a central canal, the haversian canal. The haversian canal contains the bone's blood supplies. The boundary of an osteon is the cement line.
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Sporangium A columella (pl. columellae) is a sterile (non-reproductive) structure that extends into and supports the sporangium. In fungi, the columella, which may be branched or unbranched, may be of fungal or host origin. Secotium species have a simple, unbranched columella, while in Gymnoglossum species, the columella is branched. In some Geastrum species, the columella appears as an extension of the stalk into the spore mass (gleba).
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- Each osteon consists of concentric layers, or lamellae, of compact bone tissue that surround a central canal, the haversian canal.The haversian canal contains the bone's blood supplies. The boundary of an osteon is the cement line.istology of compact bone showing osteon. Each osteon consists of concentric layers, or lamellae, of compact bone tissue that surround a central canal, the haversian canal. The haversian canal contains the bone's blood supplies. The boundary of an osteon is the cement line.
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Mechanoreceptor Lamellar corpuscles, or Pacinian corpuscles, are pressure receptors located in the skin and also in various internal organs. Each is connected to a sensory neuron. Because of its relatively large size, a single lamellar corpuscle can be isolated and its properties studied.amellar corpuscles, or Pacinian corpuscles, are pressure receptors located in the skin and also in various internal organs. Each is connected to a sensory neuron. Because of its relatively large size, a single lamellar corpuscle can be isolated and its properties studied.
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Image: Fish Dissection - Gills exposed The gill filaments of bony fishes (also known as a primary lamellae) are complex structures which have a large surface area. Off each are numerous smaller secondary lamellae. Tiny blood capillaries flow through the secondary lamellae of each gill filament.The direction of blood flow is opposite to that of water flow.ill arches : Most fishes have gill arches. They are the boomerang-shaped bony or cartilaginous structures that support the gills. Each gill arch comprises an upper and a lower limb that are joined posteriorly. Attached to the gill arches are the gill filaments and gill rakers.
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Mechanoreceptor Lamellar corpuscles, or Pacinian corpuscles, are pressure receptors located in the skin and also in various internal organs. Each is connected to a sensory neuron. Because of its relatively large size, a single lamellar corpuscle can be isolated and its properties studied.n glabrous (hairless) skin, there are four principal types of mechanoreceptors, each shaped according to its function. The tactile corpuscles (also known as Meissner corpuscles) respond to light touch, and adapt rapidly to changes in texture (vibrations around 50 Hz).