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Cells in Biological Dictionary

Cells

Cells in culture, stained for keratin (red) and DNA (green) The cell is the structural and functional unit of all ... Mouse cells grown in a culture dish. ... Established in 1999, Q- Cells is the world's largest manufacturer of photovoltaic (PV) cells . Its core business is ...

White blood cells

White blood cells (WBCs), or leukocytes, are cells of the immune system defending the body against both infectious disease and foreign materials. Five different and diverse types of leukocytes exist, but they are all produced... White Blood Cells is the third album by the American ga...

Subsidiary cells

The epidermis is a single-layered group of cells that covers plants leaves, flowers, roots and stems. It forms a boundary between the plant and the external world. The epidermis serves several functions, it protects against... ... but they are protected by subsidiary cells that hav...

Sperm cells

The term sperm is derived from the Greek word (σπέρμα) sperma and refers to the male reproductive cells . In the types of sexual reproduction known as anisogamy and oogamy, there is a marked difference in the size of the... A sperm , from the ancient Greek word σπέρμα (seed) and ζῷον (li...

Somatic cells

Somatic cells are any cells forming the body of an organism, as opposed to germline cells . In mammals, germline cells are the spermatozoa and ova which fuse during fertilization to produce a cell called a zygote, from which the entire mammalian embryo develops. Every other cell...

Sex cells

Germ cells are progenitors of the gametes. These singled-out cells move through the gut to the developing gonads and undergo mitotic proliferation followed by meiosis and differentiation into either eggs or sperm . Plants do not have a germ line set aside in early... sex cell n...

Schwann cells

Named after the German physiologist Theodor Schwann , Schwann cells are a variety of glial cell that keep peripheral nerve fibres alive. In myelinated axons, Schwann cells form the myelin sheath (see below). The sheath is not continuous. Individual myelinating Schwann ... Schw...

Rod cells

There are about 120 million rod cells in the human retina. ... Additionally, multiple rod cells converge on a single interneuron, collecting ... 6 Ganglion cell (non- rod non-cone) photoreceptors. 7 See also. 8 Bibliography. 9 References ... In rod cells , these to...

Red blood cells

Red blood cells are the most common type of blood cell and the vertebrate body's principal means of delivering oxygen to the body tissues via the blood . They take up oxygen in the lungs or gills and release it while squeezing... Red blood cells are red only because th...

Plasma cells

Plasma cells , also called plasma B cells , plasmocytes, and effector B cells , are white blood cells that produce large volumes of antibodies. They are transported by the blood plasma and the lymphatic system. Like all blood... plasma cell n. Any of the antibody-secreting cells f...

Parenchyma cells

Parenchyma is a term used to describe a bulk of a substance. It is used in different ways in animals and in plants. The form of parenchyma cells varies with their function. The epidermal parenchyma cells of a leaf are barrel shaped in cross section, but ... Aspects of th...

Interstitial cells

Leydig cells , also known as interstitial cells of Leydig, are found adjacent to the seminiferous tubules in the testicle. They can secrete testosterone and are often closely related to nerves. Leydig cells have round... Interstitial cell . From Wikipedia, the free encyclopedia. J...

Goblet cells

Goblet cells are glandular simple columnar epithelial cells whose sole function is to secrete mucus. They use both apocrine and merocrine methods for secretion. Regardless of fixation, goblet cells have a distinctly polarized morphology. ... Goblet cells have the ability to differe...

Glial cells

Glial cells , commonly called neuroglia or simply glia, are non-neuronal cells that provide support and nutrition, maintain homeostasis, form myelin, and participate in signal transmission in the nervous system. In the human... Glial cells , commonly called neuroglia or simply glia, ar...

Cone cells

Cone cells , or cones, are photoreceptor cells in the retina of the eye that function best in relatively bright light. The cone cells gradually become sparser towards the periphery of the retina. A photoreceptor, or photoreceptor cell, is a specialized type of neuron (nerve cell) foun...

Companion cells

(Redirected from Companion cell ) Jump to: navigation, search. Cross-section of ... cells ... The cytoplasm of a companion cell is connected to the sieve-tube ... Aspects of the topic companion -cell are discussed in the following places at Britannica. Assorted References assoc...

Zygotene

...ges in mice were ... The staining became brighter through zygotene as the protein accumulated in ... Cultures with mostly leptotene/ zygotene cells or later gave substantial Rec102 ... zygotene . ... zygotene . Noun. 1. the second stage of the prophase of meiosis (hypernym) phase, stage ...

Zygote

...describe the first stage of a new unique organism when it consists of just a single cell. The term is also used more loosely to refer to the group of cells formed by the first few cell divisions, although... 3D computer modeling company. zygote ( ) n. The cell formed by the union of two gamet...

Zygospore

...etes, as in algae or fungi. ... How is the zygospore of chlamydomonas formed? ... zygospore a plant spore formed by two similar sexual cells ... the zygospore of chlamydomonas formed? What is The life cycle of these fungi include a zygospore ? ... Woleb os, evoba sa. ... Zygosp...

Yolk plug

... Yolk plug is the remaining patch of endodermal cells that is created during the formation of the vent...the blastopore. It is a patch of large endodermal cells which remains exposed on the vegetal surface of t...vigation, search ... The large edible endothermal cells surrounded by the blastopore of an ... ... b...

Xylem

... Phloem ... Sap is a fluid transported in xylem cells or phloem sieve tube elements of a plant. ......ylem , phloem, parenchyma, and cambium cells. ... cells also occur within the xylem and phloem of vas...ls comprise a vertical chain of lengthened, dead cells known as vessel elements. ... xylem is an impor...

Western blotting

...ti ... Western Blotting with Monoclonal Antibodies, BD Biosciences - A detailed step by ... Protocol for Western Blotting of Tissue Culture cells ... ...

Voluntary muscle

... muscles of someone with DMD or BMD? ... gradually weakens the skeletal, or voluntary , muscles , those in the arms, legs and trunk. ... In the cells of voluntary muscles (those we can move at will, such as the arm ... Voluntary muscle fibers are long and thin, and most of them move bones...

Vitamin

...anic compound ... A vitamin B12 blood test measures the amount of vitamin B12 in the body. ... The body needs this B vitamin to make blood cells and to maintain a healthy ... Offers a variety of supplements. Information on the benefits vitamin e offers in terms of heart disease and...

Virus

...computer Virus , a Action Game from AddictingGames: Stay as close to the center of the screen as possible to spread your virus . The white blood cells are coming for you Shop for award-winning antivirus and antispyware software protection against viruses , spyware, trojans, worms, spam and hacke...

Virology

... Virology is the study of viruses and virus-like agents: their structure, classification and evolution, their ways to infect and exploit cells for virus reproduction, the diseases they cause, the techniques to isolate and culture them, and their use in research and... Virology Journ...

Vessel cell

...eridophytes ( in lower vascular plant (biology): cells of the vascular system ) ...secondary walls disp...al vessel ... non-Tin expressing cell (those cells of the dorsal vessel lacking black nuclei) .....ll precursors. ... It is believed that stem cells have the potential to be any cell in the body. ...

Venules

...ecialized post-capillary venous swellings characterized by simple cuboidal cells as opposed to simple Squamous cells found in regular venules . HEVs enable lymphocytes circulating in the b...

Ventral root

...to the nerve root sleeve run the sinuvertebral nerves. ... The root cells are situated in the ventral and lateral gray horns and vary ... The root cells contribute their axons to the ventral roots of the spinal nerves ......

Vascular system

... The circulatory system is an organ system that passes nutrients, gases, hormones, blood cells, nitrogen waste products, etc. to and from cells in the body to help fight diseases and help stabilize body temperature and pH to... Vascular tissue is a complex conducting tissue, formed of mo...

Vascular cambium

... ... i.e. a vascular cambium that produces cells on ... xylem produced by the vascular cambiu...of the plant (root and ... Vascular cambium cells are of two types (Crang and Vassilyev): fusiform .... As the vascular cambium adds new xylem cells toward the inside of the stem and ... Growth Ri...

Vascular plants

...... Vascular plants show a progression of increasing sporophyte dominance from the ... The vascular plants have specialized transporting cells xylem (for transporting ... Vascular plant summary with 18 pages of encyclopedia entries, essays, summaries, research information, and more....

Vascular bundles

...ar bundles , which are randomly scattered ... ... into discrete strands called vascular bundles , each containing xylem and phloem. ... The cells between the vascular bundles are thin-walled and often store ... In BTK, vascular bundles of inner perianth segments separate into multipl...

Vacuoles

...nelle which is present in all plant and fungal cells and some protist, animal and bacterial cells. ...online dictionary ... Vacuoles are found in the cells of plants, protists, and some primitive animals. ...Vacuoles . The term means "empty space" ... Plant cells have very large distinct vacuoles . ... The memb...

Vacuole

...nelle which is present in all plant and fungal cells and some protist, animal and bacterial cells. V...nelle which is present in all plant and fungal cells ... The Major Role of the Rab Ypt7p in Vacuole ... vacuole (vky-l) ... Vacuoles are found in the cells of plants, protists, ... Vacuole - Definitio...

Uropod

...on linkage in immune interactions. ... The number of uropod -bearing cells was determined in each experiment by direct ... of PSGL-1, ICAM-3, and moe...he water. ... The uropod , a protrusion at the rear of amoeboid motile cells such as leukocytes, ... Remodelling of cell shape by uropod -interferin...

UvrA

...cillus stearothermophilus UvrA Provid... In addition, UvrA contains three zinc modules, the number and ligand sphere of ... By the analysis of cells lacking UvrA , we demonstrate ... of UvrA . Although we present evidence ... We also show that UvrA is responsible for methylglyoxal ... ...

Urine

... blood and produce urine . Is your child having a urine culture or urinalysis performed? ... Sometimes, when the urine contains white blood cells or protein, or the test ... In Roman times, there was a tradition among the Gauls to use urine to whiten teeth. ... In China, the urine of you...

Urinary bladder

...reservoir. It rests on the front part of the pelvic floor (see below), behind the symphysis ... Urinary . Bladder Adenocarcinoma begins. in the cells of glandular struc ... for Urinary Bladder Adenocarci- noma is surgery, which can re- move the cancerous ... The Urinary and Bladder Cente...

Upper epidermis

... The epidermis is a single-layered group of cells that covers plants leaves, flowers, roots and s... upper or outer layer of the two main layers of cells that make up ... Epidermis (botany) Cross-se... Upper epidermis . This is a single layer of cells containing few or no chloroplasts. ... of the low...
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