ventral

Yolk plug

...ed in the blastopore after the formation of the ventral lip during gastrulation . Full article >>> yolk plug In amphibians, when the opening of the archenteron , the blastopore , is filled with yolk -rich cells , it is called the yolk plug . Z ... Full article >>>...

Wild-type

... is express ed distal ly in a wedge of anterior ventral cells (Couso et al. 1993; Williams et al. 1993; Ng et al. 1996) Wingless is distributed asymmetricly in the embryo . Full article >>> back- mutation A mutation that causes a mutant gene to revert back to its wild-type geno...

Wildtype

...ion of the Dorsal protein is to establish the ventral identity of part of ... Full article >>> An organ ism or cell carrying a mutation . An alternative phenotype to the wild-type ; the phenotype produced by a non- wildtype allele . A B C D E F G H I J K L M N O P Q R S T U ...

Vertebrates

...onic hedgehog is involved setting up the dorsal / ventral , the back-to-front pattern of the nervous system . So telling one side from another is really what hedgehog signaling does in all different multi-cellular organ isms. Full article >>> crop In vertebrates , it is an expanded part ...

Ventricle

...which functions to connect the ventricle to the ventral aorta . Synonyms: bulbus cordis, conus arteriosus, truncus arteriosus. Full article >>> pulmonary circuit The system of blood vessels from the right ventricle of the heart to the lungs , trans porting de oxygenated blood a...

Ventral

... shaped" organ . Full article >>> ventral Term applied to the lower side of a fish, or to t... land vertebrate. Full article >>> ventral [L. venter , belly ] Pertaining to the undersurface of an animal that holds its body in a horiz...

Ventral root

...l root any of the nerve roots issuing from the ventral side of the vertebrate brain or spinal cord , co...erve that carries impulses to the spinal cord ; ventral root carries impulses from the cord Source: Noland, George B. 1983. General Biology , 11th Edition...

Urinary bladder

...le >>> A saclike outgrowth from the ventral surface of the posterior part of the embryo nic gut and membrane in reptiles, birds, and mammals that functions as an embryo nic urinary bladder or as a respiratory extension of the hindgut, ... Full article >>> looking at ca...

Tunica

...62; a ciliated, mucus- secretin g groove in the ventral surface of the pharnyx of non-vertebrate chordates (e.g, tunica tes and lancelets); it aids in trans porting food to the esophagus . Full article >>> sedentary -- Living in a fixed location, as with most plant s, tunica tes, sp...

Transverse

...mbryo is towards the top of this page, while the ventral (front) surface is towards the bottom. ( Neural t...cross or crosswise traverse muscle s Fibers run ventral ly and slightly posterior ly, origin ates from cartilage of the floating ribs, the lumbar vert...

Trans

...cross or crosswise traverse muscle s Fibers run ventral ly and slightly posterior ly, origin ates from cartilage of the floating ribs, the lumbar vertebrae and the b order of the ilium and insert s on the linea alba. Full article >>> : DNA is trans cribed into RNA and RNA is ...

Thorax

...ead and thorax ) Posterior ( abdomen ) Dorso- ventral Terminal (special structures at the unsegmented ends of the embryo ) ... Full article >>> " So, in collaboration with others, we looked at where one of the homeotic genes-ultrabi thorax -was express ed in different species of cr...

Style

...>>> mucus- secretin g groove in the ventral surface of the pharnyx of non-vertebrate chordates (e.g, tunica tes and lancelets); it aids in trans porting food to the esophagus . Recent molecular evidence supports the traditional view that the endo style is ... Full article >>...

Spinal nerve

...being connected with the cord by a dorsal and a ventral root . Full article >>> The Spinal...erve that carries impulses to the spinal cord ; ventral root carries impulses from the cord Source: Noland, George B. 1983. General Biology , 11th Edition...

Spinal cord

...pond to the signaland then differentiate into the ventral part of the spinal cord , which makes the motor...erve that carries impulses to the spinal cord ; ventral root carries impulses from the cord Source: Noland, George B. 1983. General Biology , 11th Edition...

Secretin

...62; a ciliated, mucus- secretin g groove in the ventral surface of the pharnyx of non-vertebrate chordates (e.g, tunica tes and lancelets); it aids in trans porting food to the esophagus . Full article >>> They start secretin g substances. They secrete interferon, which is very power...

Scrotum

...mmals that is situated outside the posterior ly ventral part of the abdomen . Full article >>> In mammals , the testes are located outside of the body, as they are suspended by the sperm atic cord and within the scrotum . Full article >>> Each vas deferens is cut nea...

Platelets

...ed in the blastopore after the formation of the ventral lip during gastrulation . Full article >>> thrombocytes platelets . thromboxanes A class of molecule s derived from arachidonate and involved in platelet aggregation during blood clotting . Thromboxanes have a common feature o...

Pharynx

...tworms, the muscular tube that protrudes from the ventral side of the worm and ends in the mouth . Full a...ling metabolism and growth. It is formed from a ventral diverticulum of the endoderm of the pharynx at the level of the second pharyngeal arch. Full a...

Paramecium

...a n, having an oval body covered with cilia and a ventral ciliated groove for feeding. Full article >>> Paramecium a one-celled organ ism which is covered with many cilia (paramec = oval; -ium = small) Parapatric Species species occupying adjacent areas which meet at a b order (par...

Neuron

...issue . neuropodium Lobe of parapodium nearer the ventral side in polychaete annelids. Full article >>> neuron (nerve cell ) - cell with long processes specialized to receive, conduct, andtransmit signals in the nervous system passive transport ( facilitated diffusion ) - movement...

Nerve chord

...euterostome s also have a dorsal , rather than a ventral , nerve chord ... Full article >>>...

Nerve roots

...s bound together. Full article >>> ventral root any of the nerve roots issuing from the ventral side of the vertebrate brain or spinal cord , containing the motor nerves . Full article >&#...

Metabolism

...ling metabolism and growth. It is formed from a ventral diverticulum of the endoderm of the pharynx at the level of the second pharyngeal arch. Full article >>> virulence . The relative infectiousness of a bacteria or virus , or its ability to overcome the resistance of the host ...

Infundibulum

...dibulum funnel-like growth such as that from the ventral part of the diencephalon of the brain Source: Nol...ny funnel-shaped passage. 2) Embryo logically, a ventral evagination of the floor of the diencephalon that forms the posterior lobe of the pituitary glan...

Incisor

...ral incisor , which is indicative of a very mild ventral midline patterning defect. Full article >>> dental formula A notation that indicates the number of incisor s, canines , premolars , and molars in the upper and lower jaw of a mammal. denticle A small toothlike process. denticles (d...

Hypothalamus

... Full article >>> hypothalamus A ventral part of the forebrain beneath the thalamus ; one of the centers of the autonomic nervous system . hypotheca the smaller portion of a diatom frustule ... Full article >>> As an example, the hypothalamus receives information, both...

Forebrain

... spinalis ... Full article >>> The ventral part of the vertebrate forebrain ; functions in maintaining homeostasis , especially in coordinating the endocrine and nervous system s; secretes hormones of the posterior pituitary and releasing factors, ... Full article >>> ...

Esophagus

...62; a ciliated, mucus- secretin g groove in the ventral surface of the pharnyx of non-vertebrate chordates (e.g, tunica tes and lancelets); it aids in trans porting food to the esophagus . Full article >>> moistened and lubricated by saliva (secreted by three pairs of salivary glands...

Endoderm

...nic membrane emerging as a sac from the hindgut's ventral wall; formed from the splanchnopleure (combination of endoderm and splanchnic mesoderm ). Full article >>> having two primary germ layers ( ectoderm and endoderm ) Source: Noland, George B. 1983. General Biology , 11th Edition. ...

Ectoderm

...opment ... Full article >>> In the ventral ectoderm , Hh signals in both directions leading to the expression of the patched (ptc) gene in all neighboring cells (Nakano et al., 1989; Hooper and Scott, 1989; Ingham,, 1991). Full article >>> Developmental neuroscience , ...

Dorsal

...erve that carries impulses to the spinal cord ; ventral root carries impulses from the cord Source: Nolan...e >>> For example, one way to get a ventral problem could be if we have too much signal coming from the dorsal side. Full article >>...

Cuticle

... inhibits rhomboid transcription only in the mid ventral region (Fig 3C), and if sibling embryo s are left to develop, they make ectopic naked cuticle in the same region (Figure 3D). Full article >>> The upper surface is covered with a waxy, waterproof cuticle , which serves to reduce...

Coelom

...derm , the layers of which connect dorsal ly and ventral ly to form mesenteries. Full article >>> coelom The main body cavity, which is lined with mesoderm , and found in annelids, molluscs, arthropods, echinoderms, and chordates . Covered in: Lab 12 Animal Diversity II Lab 13 Animal...

Class

...ell that consists of eight overlapping plates. A ventral muscular foot is used for creeping along or clinging to rocks. Full article >>> class switching in an antibody producing cell , a switch in the class of antibody being synthesized Source: Jenkins, John B. 1990. Human Gen...

Chordate

...> Chordate s have a dorsal rather than ventral nervous system . Several evolution ary trends occur in chordate s : spinal cord , continuation of cephalization in the form of larger and more complex brains, and development of a more elaborate nervous system . Full article >>>...

Chordates

...2;> Chordates have a dorsal rather than ventral nervous system . Several evolution ary trends o...62; a ciliated, mucus- secretin g groove in the ventral surface of the pharnyx of non-vertebrate chordates (e.g, tunica tes and lancelets); it aids in ...

Cephalization

...ion ). Planarians feed through a mouth on their ventral surface. It leads to an elaborate gastrovascular cavity. But there is no separate exit so undigested food has to leave by the mouth . Full article >>>...

Blastoderm

...ead and thorax ) Posterior ( abdomen ) Dorso- ventral Terminal (special structures at the unsegmented ends of the embryo ) ... Full article >>> Ci protein first appears dorsal ly in the cellular blastoderm of embryo s (Fig 1A). (Motzny, 1995). The expression domain expands t...

Bilateral symmetry

...ral symmetry (hence the name); that is, dorsal - ventral and left-right axes triploblastic (three tissue layers: ectoderm , mesoderm , endoderm ) ... Full article >>> bilateral symmetry A form of symmetry in which only the midsagittal plane will divide an organ ism into mirror imag...

Belly

... axis) back side and belly side (its dorsal - ventral axis) left and right sides. Full article >&...erior -the front and then the sort of dorsal to ventral , or the belly to the back of the animal . And these gene position along the embryo . Full ar...

Band

...band of tendon ous tissue found along the mid- ventral line. Covered in Lab 17 Rat and Frog Comparative Anatomy ... Full article >>> Cytokinesis ( division of the cytoplasm ) begins in anaphase . A cleavage furrow forms as actin filaments underneath the plasma membrane constr...

Arteries

... one of up to six paired arteries that join the ventral and dorsal aorta in vertebrates or their embryo s. Full article >>> A cardiovascular disease caused by the formation of hard plaque s within the arteries . artificial selection The selective breed ing of domesticated plant ...

Aortic arch

... one of up to six paired arteries that join the ventral and dorsal aorta in vertebrates or their emb...s (sometimes referred to as aortic arch es) to a ventral vessel. Full article >>> The earthworm doesn't actually have a " heart ". It has fiv...

Aorta

...which functions to connect the ventricle to the ventral aorta . Synonyms: bulbus cordis, conus arteriosus, truncus arteriosus. Full article >>> For example, people with Marfan syndrome may be tall, thin, have long legs, arms and fingers, and may be nearsighted. Their connective tissu...

Anlage

...e. Annelids have a complete digestive tract and a ventral nerve cord. annelids See segment ed worms. Full article >>> Related Terms: Anlage Embryo nic primordium from which a specific part of the organ ism develops. The rudimentary basis of an organ in an embryo . Evolution ... ...

Allantois

...nic membrane emerging as a sac from the hindgut's ventral wall; formed from the splanchnopleure (combination of endoderm and splanchnic mesoderm ). Full article >>> allantois , amnion , blastocyst , blastomere , blastula , blastula tion, chorion, chrysalis, cleavage , embryo , em...