body

Yolk

...lacenta The branchial region Development of the body cavities The form of the embryo at different stages of its growth ... Full article >>> About 5000 nuclei accumulate in the unseparated cytoplasm of the oocyte before they migrate to the surface and are encompassed by plasma membr...

X chromosome

... X-linked genes (See dosage compensation and Barr body ). Full article >>> X chromosome ...producing a tightly-wound structure called a Barr body . Example: Lampbrush Chromosomes ... Full article >>> chromosome , se x chromos...

White blood cells

...produced in the bone marrow and help to defend the body against infectious disease and foreign materials a... are a component of blood. They help to defend the body against infectious disease and foreign materials as part of the immune system . Full article >...

Vitamins

...tial for the proper metabolism and regulation of body processes; vitamins were so named because they were though [thought] origin ally to contain an amine radicle, which is incorrect ... Full article >>> It may involve fat and fat-soluble vitamins (A, D, E and K); it may also affec...

Viscera

viscera organ s within a body cavity Source: Noland, George B. 1983. General Bi...;> viscera l mass The region of a mollusc's body that contains viscera l organ s. Viscera l organ s of the thoracic, abdominal, and pelvic caviti...

Vitamin

...tial for the proper metabolism and regulation of body processes; vitamin s were so named because they...gin ally given to essential fatty acids that the body cannot manufacture. They were "de- vitamin ized" because they are fatty acids . Fatty acids are a...

Virus

... host cell . viscera Internal organ s in the body cavity. viscera l arches See gill arches. Full a...st is a bacterium; commonly called phage . Barr body -- the condensed single X- chromosome seen in the nuclei of somatic cells of female mammals . ...

Vessels

... ) carrying blood from the posterior part of the body to the kidney s. Oxygenated blood is carried to the kidney s by the renal arteries Source: Noland, George B. 1983. General Biology , 11th Edition. St. Louis, MO. C. V. Mosby ... Full article >>> Xylem vessels arise from indi...

Vertebral column

... vertebrates , it forms the supporting axis of the body and protects the spinal cord . Full article >...h the vertebral column and the limbs support the body of the vertebrate overall. This support facilitates movement. Movement is normally achieved with mu...

Ventricle

...ut of the heart , either to the lungs or to the body tissue s. Full article >>> ventri...he parts of the heart that pump blood around the body or to the lungs . They are thicker walled than the atria, and the contr action of the ventricle ...

Ventral

... to the undersurface of an animal that holds its body in a horizontal position; to the front surface of an animal that holds its body erect. Full article >>> ventral root any of the nerve roots issuing from the v...

Venter

... to the undersurface of an animal that holds its body in a horizontal position; to the front surface of an animal that holds its body erect. ventricle ... Full article >>> 1946 - Craig Venter , American biologist ...

Vena cava

... Oxygen -depleted or de oxygenated blood from the body enters the right atrium through two great veins...or vena cava which drains the upper part of the body and the inferior vena cava that drains the lower part. Full article >>> Veins d...

Veins

...;> Veins draining the upper portion of the body lead to the superior vena cava . Veins draining the lower part of the body lead to the inferior vena cava . Both empty into the right atrium . Link to discussion of the con...

Vascular system

...ine s. Endocrine system: communicating within the body using hormones ... Full article >>>...scular system of echinoderms, protruding from the body and often ending in suckers. May be used for locomotion and/or for maintaining a tight grip on prey ...

Variation

...ded animal (mammal or bird that can maintain its body temperature within a narrow range, usually above that of its surroundings despite large variation s in environment al temperature. Full article >>> Polymorphism The occurrence of more than one form of, for example, a DNA sequence...

Vacuole

...thickened skin caused by years of infestation with body lice, Pediculus human us human us. Full article >>> vacuole [L. vacuus, empty] A membrane-enclosed sac taking up most of the interior of a mature plant cell and containing a variety of substances important in plant reprodu...

Vaccine

...xins, that induces immunity when introduced into a body Source: Noland, George B. 1983. General Biology ,...r weakened pathogen s that when injected into the body elicit an immune response . Full article >>> vaccine A harmless variant or derivat...

Urine

... urethra A tube that releases urine from the body near the vagina in females or through the penis in males; also serves in males as the exit tube for the reproductive system. Full article >>> For example, the (fictitious) transcription factor ZQ1 usually binds to the sequence s A...

Ureters

...d vas deferens . peristomium The segment of the body of an annelid that surrounds the mouth . Full article >>>...

Urethra

... to urinate] A tube that releases urine from the body near the vagina in females or through the penis in males; also serves in males as the exit tube for the reproductive system. Full article >>> urethra A narrow tube that trans ports urine from the bladder to the outside of the bo...

Ureter

.... urethra A tube that releases urine from the body near the vagina in females or through the penis in males; also serves in males as the exit tube for the reproductive system. Full article >>> renal pelvis: Basically just a funnel, the renal pelvis accepts the urine and channel...

Unicellular

...environment ally resistant dormant or reproductive body produced by plant s and some microorganisms and capable of development into a new individual either directly or after fusion with another spore . Conjugation ... Full article >>> unicellular ( cytoplasm ic) organ ization The lif...

Turgor

...ing over The mixing of thermal zones in a standing body of freshwater due to cold, more dense water "sinking" from the top through the other layers. Full article >>> (Redirected from Turgor ) Jump to: navigation, search Osmotic pressure or turgor (also called turgor pressure) is the pr...

Turbellarian

...ming platyhelminth of the class Turbellaria, the body of which is covered with cilia. Full article >>> releaser gland A gland in turbellarian s that secretes a chemical that dissolves the attachment of the organ ism from a substrate . releaser Simple stimulus that elicits an innate beh...

Tube feet

...scular system of echinoderms, protruding from the body and often ending in suckers. May be used for locom...mall, muscular, fluid-filled tubes projecting from body of echinoderms; part of water- vascular system ; used in locomotion, clinging, food handling, and r...

Tropism

...ology the study of the functioning of the various body parts (physio = nature; -logy = to study) ... Full article >>> Arabidopsis has been used extensively in the study of the genetic basis of photo tropism , chloroplast alignment, and other light influenced processes. Full article...

Transverse

...ne A plane or section that lies or passes across a body or structure. Full article >>> tra...examinations. Full article >>> Each body ring has several transverse grooves. Leeches possess a small anterior sucker around the mouth an...

Transgenic

...asound imaging: A technique for looking inside the body by using sound waves to create images. Full article >>> transgenic Cells or organ isms that contain genes that were insert ed into them from other organ isms using the techniques of genetic engineering . Full article >>...

Trans-

...ants" or " trans- formants," where one part of the body was trans formed into another. Full article >>>...

Tracheophytes

...ot- stem - leaf vascular system nonvascularized body ( thallus ) that may be variously shaped ... Full article >>> tracheophytes Plant s with a well-defined vascular system . tract A bundle of nerve fibers within the central nervous system . Full article >>> vascular...

Tracheophyte

...ot- stem - leaf vascular system nonvascularized body ( thallus ) that may be variously shaped ... Full article >>> tracheophyte s Plant s with a well-defined vascular system . tract A bundle of nerve fibers within the central nervous system . Full article >>> Trache...

Tracheae

...at extends from holes to all parts of an anthropod body to assist in gas exchange. tracheids : the main c... tubes that carry air from spiracles through the body cavity of an arthropod; arthropod tracheae are modification s of the exoskeleton . Full article...

Trachea

...nimals have their respiratory surfaces inside the body and connected to the outside by a series of tubes....] Tiny air tubes that branch throughout the insect body for gas exchange. Full article >>> trachea : the windpipe of mammals . trachea e ...

Tongue

.... Full article >>> Animals with a body covered by fur have limited ability to sweat, and rely heavily on panting to increase evaporation of water across the moist surface of the tongue and mouth . Full article >>> A tongue that can be used for catching prey as well as ...

Tissue

...ue s There are four basic types of tissue in the body of all animals , including the human body and lower multicellular organ isms such as insects. These compose all the organ s, structures and ...

Thorax

thorax part of the body between the head (or neck) and abdomen Source: N...62;>> thorax -- In insects, the second body region, between the head and thorax . It is the region where the legs and wings are attached. till ...

Thermoregulation

...ation is the ability of an organ ism to keep its body temperature within certain boundaries, even when t...;>> thermoregulation The regulation of body temperature. thigmo tropism Plant s' response to contact with a solid object; e.g., tendrils' twin...

Thallus

.... thallos, a young twig] A simple plant or algal body without true roots , leaves, or stems. Full article >>> thallus The complete body of a seaweed. thecodonts A large assemblage of Triassic archosaurian diapsids of the order Thecodo...

Tetrapod

...rtebrates which are ectotherm ic (deriving their body temperature from their environment ) rather than endotherm ic (deriving their body heat from an independent, ... Full article >>>...

Testes

...skin that keeps the testes close or far from the body at an optimal temperature for sperm development. Full article >>> Testes appeared in heraldry in the arms of the Neapolitan family of Coglione: per fess argent and gules, three pairs of testicles counterchanged.[3] [edit] See als...

Tendons

...dons must be strong to facilitate movement of the body while at the same time remaining compliant to prevent damage to the muscle tissue s. Full article >>> It is found in tendons and the organ ic part of bone. Type II collagen - Articular cartilage ... Full article >>&...

Telson

telson Posterior projection of the last body segment in many crustacea ns. temnospondyls A large lineage of amphibians that extended from the Carboniferous to the Triassic. Full article >>> telson -- The last segment of the abdomen in many arthropods. May be flat and p...

Telophase

...lopes. telson Posterior projection of the last body segment in many crustacea ns. Full article >>> telophase II: the phase during meiosis II in which the chromosomes gather at the poles of the cells and form a mass of chromatin ; the nuclear envelope develops, the nucleoli ...

Synapse

...nd a signal-receiving portion ( dendrite or cell body ) of another neuron or effector cell . Full article >>> Ab42 (the 42-amino-acid form of Ab) induces membrane lipid per oxidation in synapse s and dendrites resulting in impairment of membrane ion-motive ATP ases and glucose ...

Symbiosis

...f the autonomic nervous system that prepares the body for an emergency. Full article >>> symbiosis -- n. A relationship between two organ isms that live in intimate contact with each other; includes mutualism (both organ isms benefit, they rely on each other for survival ), ... Fu...

Suppression

...nal plasma , can cause immuno suppression in the body when introduced to the bloodstream or lymph . Full article >>> What drove this suppression of XY recombination ? We don't absolutely know for sure, but we suspect that [there was] a series of inversion s of big chunks of DNA on ...

Survival

... the heart and respiratory system slow down, and body temperature is maintained at a lower level than normal. Full article >>> K-strategist Species of organ ism that uses a survival and reproductive "strategy" character ized by low fecundity , low mortality, and longer life and wit...

Superior vena cava

...2;> superior vena cava Drains the anterior body regions, returning blood back to the heart via t... Oxygen -depleted or de oxygenated blood from the body enters the right atrium through two great veins , the superior vena cava which drains the upper...

Superficial

... ovule . superior vena cava Drains the anterior body regions, returning blood back to the heart via the right atrium . Covered in Lab 16 Rat Respiratory and Circulatory System s ... Full article >>> The superficial cervical muscle The lateral cervical muscle s The supra-...

Strand

... such as mold, mildew, smut, or rust. The fungus body normally consists of filamentous strand s called mycelium and reproduces through dispersal of spore s. G Index ... Full article >>>...

Stomach

...as been ingested by an insect, entering the insect body through the gut. Full article >>> stomach The muscular organ between the esophagus and small intestine that stores, mixes, and digests food and controls the passage of food into the small intestine . PICTURE ... Full article ...

Stolon

...;>> stolon A rootlike extension of the body wall giving rise to buds that may develop into new zooids, thus forming a compound animal in which the zooids remain united by the stolon . Full article >>> stolon A long slender stem running along the surface of the ground...

Stoma

...as been ingested by an insect, entering the insect body through the gut. Full article >>> stoma pl. stoma ta [Gk. mouth ] A microscopic pore surrounded by guard cell s in the epidermis of leaves and stems that allows gas exchange between the environment and the interior of the p...

Stigma

...8 Seed Plant Reproduction stipe The fruiting body of a fungus . Full article >>> Ris...h God, to be demonstrated by the impression on his body of the wounds of Christ (see Stigma ta); ... Full article >>> pistil : the structur...

Stipe

...ull article >>> stipe The fruiting body of a fungus . stipule one of a pair of leaflets found at the base of a leaf where it joins the stem . Full article >>> Fucus is a brown alga differentiated into a floating "blade", flotation bladder, stalk (or stipe ) and ...

Stem

...at is mitotically active in either replacing dying body cells ( somatic stem cell ) or producing ga...lion red blood cells are created each day in the body from ... Full article >>> Dr. Donald Orlic, of the National Human Genome Research...

Stem cell

...at is mitotically active in either replacing dying body cells ( somatic stem cell ) or producing game...lion red blood cells are created each day in the body from ... Full article >>> Dr. Donald Orlic, of the National Human Genome Research...

Stapes

... article >>> The longest bone in the body is the femur and the smallest is the stapes bone in the middle ear. Contents 1 Function ... Full article >>>...

Stamen

... an animal tissue which coats or lines various body parts (epi = upon over; theli = nipple) ... Full article >>> Hand tree (Bot.), a lofty tree found in Mexico (Cheirostemon platanoides), having red flower s whose stamen s unite in the form of a hand. Hand vise, a small vise held in...