The nucleus is prominently at the centre of the cell. The unusual feature of the cell is that it contains reddish-brown ... Cells have convex dorsal margins and small oval shaped cells and their thecal plates are covered with areolae (circular ... acuminata cells are irregularly egg-shaped, dorsally convex and have large hypothecal plates with a more or less oval shape. ... The taxonomic identification of Dinophysis species is largely based on cell contouring, size and shape of their large ...
... spheroidal cells surrounded by a smooth cell wall. Young cells have a single nucleus, but mature cells have nuclei (i.e. are ... Each cell has multiple chloroplasts lining the outer wall of the cell; each chloroplast is saucer-shaped when young and divided ... Cells may have secondary carotenoids present, giving the cells an orange color especially when old. Pseudomuriella reproduces ...
Their colonies consist of 8-20 cells and take on a spiral, star-like shape. They may also occur in a closed ring shape, but ... Within each cell is a nucleus at their center and 6-8 golden-brown chromatophores. Asterionella formosa colonies consist of ... To prevent the fungus from spreading, affected cells in the colony usually induce cell death. A. formosa laboratory models have ... Asterionella formosa has valves (siliceous plate that makes up a half of a diatom cell) that are long and narrow, with capitate ...
Infected cells have large numbers of abnormal chloroplasts, mitochondria and hypertrophied nuclei. Cells of CPsV-EG infected ... which are displaced toward nucleus periphery along the nuclear envelope. Sometimes nucleolus appear abnormally shaped. ... In general CPsV-EG-infection affects the upper epidermis of the leaf which is composed of non-tabular parenchyma cells covered ... Crystal idioblast (CI) containing cells are lacking in the palisade layer and protrude into the epidermis. The oil glands are ...
The infected cells are hypertrophied and distorted and their nuclei are displaced. The schizonts are polymorphic and contain 12 ... nuclei when apparently mature. Prematuration sexual stages may be irregularly shaped and larger than mature gametocytes. The ...
The cells are polygonal or ovoid in shape, malleable, and lack nuclei; typical thickness is 1-2 µm. Nuclear ghosts are ... It is produced by dedicated cells and is thought to have some protective roles during fetal development and for a few hours ... Vernix has a highly variable makeup but is primarily composed of sebum, cells that have sloughed off the fetus's skin and shed ... Around the 21st week of gestation, periderm cells are being shed and replaced with stratum corneum; these shedding mix with ...
Additionally, the nucleus of anaplastic cells is usually unnaturally shaped or oversized. Cells can become anaplastic in two ... in size and shape). Anaplastic cells display marked pleomorphism. The cell nuclei are characteristically extremely ... Anaplastic cells have lost total control of their normal functions and many have deteriorated cell structures. Anaplastic cells ... Giant cells - considerably larger than their neighbors - may form and possess either one enormous nucleus or several nuclei ( ...
... to fit the small available volumes of the cell. In eukaryotes, DNA is located in the cell nucleus, with small amounts in ... These two long strands coil around each other, in the shape of a double helix. The nucleotide contains both a segment of the ... However, the amount of mitochondria per cell also varies by cell type, and an egg cell can contain 100,000 mitochondria, ... In 1933, while studying virgin sea urchin eggs, Jean Brachet suggested that DNA is found in the cell nucleus and that RNA is ...
They tend to encircle the nucleus and the host cell tends to become oval in shape. Male gametocytes measure 20 micrometres x 2 ... The host cells are not altered in either shape or size by the asexual stages of the parasite. Pigment is rare and a vacuole may ...
Due to the absence of cell walls these organisms can change their shape and are pleomorphic. Lack of nucleus and other membrane ... They also become hyperchromatic due to an increase of DNA in the nucleus of the cells. In later stages, the cells lose the need ... Due to the lack of a rigid cell wall, Mycoplasma species (like all Mollicutes) can contort into a broad range of shapes, from ... The first visual sign of infection is when the cells gradually shift from their normal form to sickle-shaped. ...
lunate Crescent-shaped. lumen The cavity bounded by a plant cell wall. lyrate Lyre-shaped; deeply lobed, with a large terminal ... coenocyte A single cell with multiple nuclei, formed when nuclear division was not followed by cytokinesis. coleoptile One type ... sclereid A cell with a thick, lignified, cell wall that is shorter than a fiber cell and dies soon after the thickening of its ... stone cell a sclereid cell, such as the cells that form the tissue of nut shells and the stones of drupes. striate Striped with ...
Cell nucleus § Splicing speckles are subnuclear structures that are enriched in pre-messenger RNA splicing factors Berezney, ... They usually appear as irregularly shaped structures that vary in size and number. They can be observed by immunofluorescence ... An interchromatin granule is a cluster in the nucleus of a mammal cell which is enriched in pre-mRNA splicing factors. ... Interchromatin granules are located in the interchromatin regions of the mammalian Cell nuclei. ...
Fusion of haploid nuclei (karyogamy) occurs in the basidia, club-shaped end cells. Shortly after formation of the diploid cell ... meiosis occurs and the resulting four haploid nuclei migrate into four, usually external cells called basidiospores. Sexual ...
The central axons form synaptic connections with cells in the cochlear nucleus of the brainstem. The cell bodies of the ... cochlear nerve lie within the cochlea and collectively form the spiral ganglion, named for the spiral shape it shares with the ... the anteroventral cochlear nucleus (AVCN) the posteroventral cochlear nucleus (PVCN) Each of the three cochlear nuclei are ... There, its fibers synapse with the cell bodies of the cochlear nucleus. In mammals, cochlear nerve fibers are classified as ...
A nucleus is also found in the cell and its location and shape can distinguish between species. Karenia is found throughout the ... The cell body can be divided into an episome and a hyposome like other dinoflagellates. Two dissimilar flagella that are ... The cell contains a straight apical groove, and differences in apical grooves (acrobases) are often used to distinguish between ... Karenia follow the typical life cycle of a dinoflagellate with a motile, haploid, asexual cell with regular mitotic divisions. ...
... they are spindle-shaped, and each possesses a large spherical nucleus near the middle of the cell. The peripheral end of the ... The bud is formed by two kinds of cells: supporting cells and gustatory cells. The supporting (sustentacular cells) are mostly ... These are located on top of the taste receptor cells that constitute the taste buds. The taste receptor cells send information ... Taste buds are clusters of taste receptor cells, which are also known as gustatory cells. The taste receptors are located ...
Cells contain one nucleus, a single parietal chloroplast and one or several pyrenoids with a starch sheath. Cells reproduce ... Pseudoschroederia consists of solitary cells. Cells are spindle-shaped, straight or curved, 22-84 μm long. One end tapers into ... Species are distinguished from one another by their overall shape and size. Guiry, M.D.; Guiry, G.M. "Pseudoschroederia". ... The genus was distinguished from the similar Schroederia by being heteropolar and differing cell structure. However, some ...
Cells of C. marina are rounded on the right side and flattened on the left side, resembling the shape of a "D". The cell body ... C. marina cells localize their nucleus and mitochondria with tubular cristae (as is common in Stramenopiles) in the anterior ... Another peculiarity of C. marina is the change in shape of the Golgi apparatus during the cell cycle. Cells of Cafileria marina ... During the cell cycle, the shape of the Golgi cisternae changes from flat-stacked to rounded: the flat cisternae curve inside ...
Microglial cells are small relative to macroglial cells, with changing shapes and oblong nuclei. They are mobile within the ... These PNS glia include Schwann cells in nerves and satellite glial cells in ganglia. Glia retain the ability to undergo cell ... ependymal cells and microglia, and in the peripheral nervous system they include Schwann cells and satellite cells. They have ... glial cells known as Schwann cells (or also as neuri-lemmocytes) promote repair. After axonal injury, Schwann cells regress to ...
Nuclear divisions proceed until numerous cone shaped nuclei are found below the cell membrane. This cell membrane becomes ... The nucleus assumes a characteristic spindle shape and subsequently divides. ... A single nuclear division then occurs and the two nuclei elongate to form sporozoites each with a small cytoplasmic body. The ... The microgamete possesses a dark centre and a lighter ring round the periphery and is released from the host cell. ...
Nucleolus: This structure is within the nucleus, usually dense and spherical in shape. It is the site of ribosomal RNA (rRNA) ... Eukaryotic cells are composed of the following organelles: Nucleus: The nucleus of the cell functions as the genome and genetic ... Prokaryotic cells are distinguished from eukaryotic cells by the absence of a cell nucleus or other membrane-bound organelle. ... Prokaryotic cells include Bacteria and Archaea, and lack an enclosed cell nucleus. Eukaryotic cells are found in plants, ...
Virions invade the columnar cells of midgut epithelium and integrate DNA into the nucleus of midgut cells. Later the viral DNA ... The NPVs come under the family of baculoviridae and its virions are enveloped rod shaped nucleocapsids containing circular, ... The ECVs which are the progenies released into the haemocoel from the midgut cells are more infectious than the PIBs and ...
... the cell's cytoplasmic levels of white blood cells increase; additionally, elongated shapes, commonly depicted as "tadpole", " ... In its initial from, stellate cells with amphiphilic cytoplasm and ovular central nuclei are observed. Commonly referred to as ... Rhabdomyoblasts are early stage mesenchymal cells, having the potential to differentiate into a wide range of skeletal cells. ... "strap" and "spider cells", are observed. In the concluding phase of differentiation, the white blood cell rich cytoplasm ...
... disk-shaped and deformable to allow them to squeeze through narrow capillaries. They do not have a nucleus. Red blood cells are ... Mature red blood cells are unique among cells in the human body in that they lack a nucleus (although erythroblasts do have a ... Red blood cells are the most abundant cell in the blood, accounting for about 40-45% of its volume. Red blood cells are ... A blood cell, also called a hematopoietic cell, hemocyte, or hematocyte, is a cell produced through hematopoiesis and found ...
Dendritic cells have an indented (bean-shaped) nucleus and cytoplasm with thin processes (dendritic). Their main activity is ... Langerhans cells are antigen-presenting cells but have undergone further differentiation. Skin Langerhans cells express CD1a, ... A subset of cells differentiates into Langerhans cells; this maturation occurs in the squamous epithelium, lymph nodes, spleen ... Histiocytes are derived from the bone marrow by multiplication from a stem cell. The derived cells migrate from the bone marrow ...
... are characterized by rod-shaped and enveloped nucleocapsids and they replicate in the nucleus of infected host cells. In some ... Some viral genes allow the cell to survive for longer while producing more virions; Heliothis zea Nudivirus 1 (HzNV-1 or Hz-1 ... has been found to suppress the hhi1 gene which can cause the cell to die. A second inhibitor gene (Ac-iap2) to the hhi1 gene ...
... is overlapped by a large oesophageal gland with a substantial cell nucleus in the middle. Its excretory pore is located ... The posterior end of its body counts with two lateral U-shaped mounds. Its spicules are slender and needle-like; the right ...
The cells mostly have one vesicular nucleus with a central nucleolus, although cells with two nuclei have been observed. The ... Their acanthopodial (tooth-shaped) extensions can form from all areas of the cell body. Occasionally, the cells produce filose ... It has a mean cell length or breadth of 22.5 μm, a nucleus with a diameter from 3.2 to 5.5 μm, and a nucleolus with a diameter ... The cysts are between round and irregularly shaped, with a single wall, and usually form individually rather than in clusters. ...
... however there have been cases of some cells containing two or even three nuclei. The nucleus of F. alba cells have an ... As the number of dictyosomes decreases, the cytoplasm takes up more room within the cell and the cell adapts a more round shape ... Cystic cells are above the amoeboid cells, these cells are preparing to flourish into spores and thus have less dictyosomes, ... orogenic cells begin to depict differential shapes and thus different functions. Amoeboid cells remain near the base, ...
However, nuclei division start happening and many nuclei are produced inside generating giant cells. Surrounding cells will ... For M. exigua, these cells will become galls, but not for M. coffeicola. The nematode starts to swell and get a swollen shape ... Several cells are selected to start uptaking food. Those cells are modified and grow bigger (hypertrophy) without cellular ... The female has a pear shape when swollen. It is not possible differentiate one species from other on coffee in the field due to ...
They are cylindrical in shape with folds along the surface of the cell. The nucleus is central. The nucleus is off center. A ... After undergoing syzygy, the cells have two nuclei. This new form migrates to the hepatopancreas via its openings into the ... sp.), a gregarine from the digestive tract of Anaspides tasmaniæ (Thompson). J Cell Sci s2-55: 155-175 v t e (Articles with ... spherical ball like structure may be present at the anterior end of the cell and connected to the body of the cell by a narrow ...
The nucleus can be found in the periphery of the cell. Organic spicules have been found on Raphidiophrys heterophryoidea. ... Axopodia are numerous and connect to a centroplast found in a spherical body shape. Microtubules extend from the centroplast to ... In Raphidiophrys contractilis it has been observed that upon capturing prey, its axopodia will contract toward the cell body, ...
... s are mononuclear cells and the ellipsoidal nucleus is often lobulated/indented, causing a bean-shaped or kidney-shaped ... They are cells that possess a large smooth nucleus, a large area of cytoplasm, and many internal vesicles for processing ... which activates CD4 Th2 cells and inhibits CD4 Th1 cell function. Many factors produced by other cells can regulate the ... They are then trafficked to the cell surface of the monocytes (or macrophages or dendritic cells) and presented as antigens to ...
... these parasites stick to the host cell nuclei, which are enlarged, deformed and have a crescent shape. The host's cell ... Host cells take on the ellipsoid shape from the very early stages of gametocyte development. The rest of the life cycle follows ... Young gametocytes have an effect on the shape of host cells starting at primal stages of their development. Parasites that are ... This is opposite to the host cell nuclei, which gives the growing gametocytes the appearance of giant beans with rounded ends. ...