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layer in Biological Dictionary

Upper epidermis

... Epidermis (skin), in vertebrates, the outermost layer of the skin ... Upper , epidermis ,biological ... skin of a leaf. Upper epidermis : outer layer of the leaf. ... Information relating to the ... conditions, ... Epidermis : The upper or outer layer of the two main layers of cells that make up ......

Spongy mesophyll

... of the leaf and are located in the spongy layer of the mesophyll . ... A simple cross ... . Guard cells. Lower epidermis. Palisade layer ... Mesophyll - Definition of Mesophyll at ... cells. Stomata ... spongy mesophyll - layer of plant tissue: a spongy ... Spongy Bone. ...

Serosa

... ) is a smooth membrane consisting of a thin layer of cells which excrete serous fluid. Serous ... cavity the serosa is replaced by adventitia a layer ... The serosa reduces friction as the ... layer, e.g. the serosa or any other exposed layer of the body ... ...

Periderm

... of ... The periderm is a superficial layer of cells which develops from the primordial ... ... . periderm . An outer, cortical protective layer of many roots and stems that typically ... periderm - plant tissue: the outer layer of plant tissue in woody roots and stems ......

Myelin sheath

... in Life. The main consequence of a myelin layer (or sheath ) is an increase in the speed ... ... Myelin and nerve structure. Myelin is the layer that forms around nerves. ... Review provided by ... sheath ... The main purpose of a myelin layer (or sheath ) is an increase in the speed at ...

Myelin

... is an electrically insulating phospholipid layer that ... The Myelin Project. Athabasca ... ... Myelin ... Myelin is an insulating layer that forms around nerves, including those in the ... is an electrically-insulating phospholipid layer that ... When the myelin is destroyed, nerve ...

Mesoderm

... muscle, bone, and the ... Mesoderm ... germ layer n. Any of three cellular layers, the ectoderm, ... layer, the mesoderm . ... The mesoderm germ layer forms in the embryos of triploblastic animals. ...... ... mesoderm in biology, middle layer of tissue formed in the gastrula stage of the ...

Mantle

... into layers. The mantle is a highly viscous layer between the crust and the ... Mantle ... and ... The mantle is a particular type of layer within an astronomical body. A mantle in most instances occurs in a solid object as the layer of material ... ... into four main layers: the ...

Malpighi layer

... Malpighian layer . From Wikipedia, the free encyclopedia (Redirected from Malpighi layer ) ... The Malpighian layer of the skin is composed of both the stratum ... ...

Lower epidermis

... photosynthesis. ... Lower epidermis : lower layer of the leaf. ... ... and at densities almost ... lower because it has fewer stomata. ... The last layer is then the lower epidermis . ... lower ... of many thin-walled ... In most plants the spongy layer extends down to the lower epidermis . ... ...

Lamellae

... in sandy soils. Middle lamella , a pectin layer ... A lamella is a thin plate-like structure, ... middle lamella . plant organ. plate. tissue layer ... Lamellae - Definition of Lamellae at ... -mellae ( ) or -mellas . A thin scale, plate, or layer of bone or tissue, as in the gills of a bivalve ...

Epidermis

... The epidermis is the outermost layer of the skin, composed of terminally ... Epidermis (botany), in plants, the outermost layer of cells covering the leaves ... Epidermis , ... epidermis n. The outer, protective, nonvascular layer of the skin of vertebrates, covering the dermis .....

Endodermis

... but not usually in woody stems, the innermost layer of cortical cells is differentiated into a cell layer called the endodermis . The cell walls of ... consists of the ... e)Pericycle: Cylindrical layer of cells inside endodermis . ... ... and is ...

Endoderm

... inward along the archenteron from the inner layer of the gastrula, which develops into the ... ... endoderm , in biology, inner layer of tissue formed in the gastrula stage of the ... 57. The primary germ layer endoderm is derived from : ... Sonic hedgehog ...

Dermal tissue

... system—the epidermis—is the outer protective layer of the primary plant body (the roots, stems, ... and seeds). The epidermis is usually one cell layer ... Dermal - Definition of Dermal at ... placing the ... Epidermal tissue is a single layer of cells, (except in velamen,pepperomia and ... ...

Cortex

... and consciousness. It constitutes the outermost layer of the cerebrum. In ... Look up ... cerebral cortex n. The extensive outer layer of gray matter of the cerebral hemispheres, ... Cortex , ... The cerebral cortex is the layer of the brain often referred to as gray matter. ......

Blastula

... a fertilized ovum and consists of a spherical layer of around 128 cells with a large fluid filled ... a fertilized ovum and consisting of a spherical layer of cells blastula The usually spherical body ... of a fertilized ovum, consisting of a single layer of cells (blastoderm) surrounding a ...

Blastoderm

... A Blastoderm is the layer of cells formed at one pole of macrolecithal ... layer, called ... blastoderm ( ) n. The layer of cells that develops on the surface of the ... English dictionary and ... blastoderm - a layer of cells on the inside of the blastula ... ...

Vitelline membrane

... formation. Function ... Crystal structure of vitelline membrane outer layer protein I ... Zoology information, history, articles and research ... ESTs from 22 cDNA libraries. ... Homo sapiens vitelline membrane outer layer 1 homolog (chicken), mRNA (cDNA ... The dictionary term vitelline ...

Trophoblast

... Trophoblast (Cytotrophoblast, ... trophoblast ( ) n. The outermost layer of cells of the blastocyst that attaches the fertilized ovum to the ... online encyclopedia article on trophoblast (embryology), The enveloping layer is now referred to as the trophoblast . It does not contribute directly ...

Shell membrane

... by the shell membranes , and ... The outer thin white is a narrow fluid layer next to the shell membrane . ... ... through the shell membranes ... eggs can easily be distinguished from eggs with normal shells . ... layer base into the outer shell membrane at specific sites is essential ......

Primary oocyte

... ... ... follicle consists of a primary oocyte surrounded by a layer of ... An oocyte is considered primary if it has not yet undergone its ... follicle ... Primary follicles, an oocyte surrounded by a layer of proliferating granulosa, ... ...

Pleura

... you?This topic provides information about pleurisy, which ... The outer layer of the pleura lines the inside of the chest wall, and the inner ... ... pleurisy is as well as its causes, symptoms, diagnosis, and ... The outer layer of the pleura lines the inside of the chest wall, and the inner ... ...

Phloem

... parts of the plant where needed. In trees, the phloem is the innermost layer of the bark, hence the ... phloem ( ) n. The food-conducting ... carries organic nutrients, ... In trees, the phloem is the innermost layer of the bark, hence the name, derived ... Phloem is responsible for ...

Pericycle

... is interior to the endodermis and is surrounded by the pericycle , a layer of cells that gives rise to branch roots. The conductive tissues of the ... pericycle appears anatomically normal in wol. ... Pericycle . A thin layer of undifferentiated cells. A meristem tissue ... Pericycle . ...

Muscularis

... The lamina muscularis mucosae is the thin layer of smooth muscle found in most parts of the gastrointestinal tract, ... mucosa through the muscularis externa are characteristic. ... outer layer of the MUSCULARIS EXTERNA is NOT ARRANGED in ... In the small ...

Mesentery

... In anatomy, the mesentery is the double layer of peritoneum that suspends the jejunum and ileum from the ... diseases, symptoms, treatments, and other ... Mesentery : a double layer of peritoneum that attaches to ... Encyclopedia article about ...

Ectoderm

... from ... Epidermis, derived from ectoderm , is the outer epithelial layer of the embryo, ... Definition of ectoderm from the Merriam-Webster ... the Central ... In animal embryos, the ectoderm is the outer germ layer of the embryo, formed ... GO:0007398 : ectoderm development [568 gene ...

Cuticula

... cuticul a . Comments: ... cuticle n. The outermost layer of the skin of vertebrates; epidermis. ... Main article: cuticula ... fully regain its original form. ... EPICUTICLE - The thin, outermost layer of the cuticula . ... INTERSEGMENTAL MEMBRANE - The infolded cuticula ...

Cork cell

... seed plants, producing cork on the ... as the meristematic cell layer responsible for the ... Synonyms for cork cambium are bark cambium, pericambium or phellogen. ... is defined as the meristematic cell layer responsible for the development of the periderm. ... Cork has been ...

Archenteron

... into a two-layered one, a process called gastrulation. The new inner layer of cells, called endoderm ... What is archenteron ? ... Roof into Early Triturus Gastrulae ... archenteron in its superficial layer (IMZS) and the ... Next, this short archenteron extends by ...

Vascular bundles

... composed of xylem tissue and phloem tissue. ... more prominent vascular bundles a bundle sheath of parenchyma ... There is also a layer of sclerenchyma around each of the vascular bundles (Figure 1) ... You will also notice vascular bundles , which are randomly scattered ... ...

Vascular bundle

... vascular bundles , each containing xylem and phloem. ... Aspects of the topic vascular - bundle are discussed in the following ... ... layer of sclerenchyma around each of the vascular bundles (Figure 1) ... Vascular Tissue ( Bundle )-- is a conductive tissue and consists ... the ...

Thalamus

... Get information, facts, and pictures about thalamus at Encyclopedia.com. ... thalamus The cerebral hemispheres of the brain consist of an outer layer of grey ... The thalamus is a part of the brain. ... Functionally the thalami can be thought of as relay ... It uses material from the article ...

Tectonics

... activity ... The word tectonics comes from the Greek root "to build. ... The theory of plate tectonics states that the Earth's outermost layer is ... tectonics . ... USGS Earthquake Hazards Program, responsible for monitoring, reporting, and researching earthquakes ... Plate tectonics ...

Suberin

... is to prevent water from ... In root s suberin is deposited in the radial and transverse cell wall s of the ... In plants, it is a thin layer of parenchyma found in roots, just outside the ... endodermis cells are impregnated with suberin ; a waxy substance which is water ... Very ...

Splicing

... splicing and inspection services provided ... specializes in wire rope sales and wire rope splicing for conveyor systems. ... One important layer of regulation concerns RNA splicing , in which noncoding ... Figure 2: Alternative splicing results in different mature mRNAs and ... ...

Smooth muscle

... Smooth muscle is an involuntary non-striated muscle , found within the tunica media layer of large and small arteries and veins, the bladder, uterus, male and female reproductive tracts, gastrointestinal tract, ... Vascular ...

Skeletal muscle

... Muscle is the contractile tissue of the body and is derived from the mesodermal layer of embryonic germ cells. Muscle cells contain contractile filaments that move past each other and change the size of the cell. They ... ...

Shell

... . Shell busey. Ghost in the shell ... Shell vacation club. Ghost ... The term shell derives its name from the fact that it is an outer layer of an ... A shell prompt, also referred to as a command prompt is a character or set of ... ... 160;Management Shell , ... Shell Variables. ...
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