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- Brain (22060 bytes)
4: ...[Image:Anatomy06-brain.jpg|thumb|250px|Image provided by [http://classroomclipart.com Classroom Clip A...
5: The brain is primarily made up of two types of [[cell (biology)|cell]]s: [[gl...
7: ==A smart device==
11: ...the volume of the brain compact enough to fit inside the skull.
14: ...vessel]]s in the brain, is another major cause of death and brain damage. - Eye (21834 bytes)
1: ...ight or dark. More complex eyes are used to provide the [[sense]] of [[visual perception|vision]]. Ma...
9: ...es grow outward from brain cells during embryonic development, while mollusk eyes grow inward from ski...
11: ...ranged hexagonally, and which can give a full 360 degree field of vision. Compound eyes are very sensi...
16: Jumping spiders have simple eyes that are so large, supported b...
18: ...ght|thumb|300px|Eye of a Komodo Dragon.Image provided by [http://classroomclipart.com Classroom Clip A... - Thyroid (5421 bytes)
3: ...|endocrine]] gland. It is situated on the front side of the neck at the level of C5 and T1 vertebral b...
14: ... epithelial cell]]s, which secrete T3 and T4. Inside the follicles is a colloid which is rich in a pro...
18: ...bly enlarged, resulting in the swollen necks of endemic [[goitre]].
20: ...o frogs; conversely, administering thyroxine will trigger metamorphosis.
22: ...nthetic thyroxine, which enables them to grow and develop normally. - Horn (instrument) (19243 bytes)
2: ... developed in France in about 1650 from the ''cor de chasse'' or hunting horn, and has been known as t...
6: ...sic)|harmonic series]], facilitated by its small, deep [[mouthpiece]], giving it its characteristic "m...
12: ... needed to play and the other could be free to guide his steed. The only way to change the pitch was ...
14: ...ype of horn, called the [[natural horn]] in the modern literature.
16: ...rmonic series, and there were then three valves added to it. Using these three valves, the player cou... - Trombone (15819 bytes)
1: ...lide trombone, with slide extended.''<br>''This model has a B♭ to F attachment.'']]
6: The word ''trombone'' derives from [[Italian language|Italian]] ''tromba''...
9: ...bore) after the lead pipe and through the hand slide. The bore expands through the neck pipe and backb...
12: ...history). The sackbut was slightly smaller than modern trombones, and had a bell that was more conical...
14: ... band]]s, [[Military band]]s, [[brass band]]s, [[:de:Posaunenchor|brass choir]]s, etc. It can be part ... - Influenza (10335 bytes)
1: ...monly called "stomach '''flu'''" (and widely misunderstood as being instances of influenza), see [[gas...
2: ...e the causative agent of the [[Hong Kong Flu]] pandemic. ]]
4: ...ges in the virus have caused three influenza [[pandemics]] in the [[20th century|20<sup>th</sup> centu...
12: ...sistance to influenza B and C because they only undergo [[antigenic drift]] and have more similarity w...
14: .... Only one H subtype and one N subtype have been identified for influenza B virus. At present, the mos... - Sun (20830 bytes)
2: ...="margin: 0 0 1em 1em; border: 1px #aaa solid; border-collapse: collapse;" align="right" width=280px
13: ! align="left" | [[Apparent magnitude|Visual brightness]] (''V'')
16: ! align="left" | [[Absolute magnitude]]
48: ! align="left" | Density
76: | 7.25[[degree (angle)|?]] <br>(to the [[ecliptic]]) <br>67.... - Electronic musical instrument (4501 bytes)
3: ...ts are sometimes called [[sound effect]]s; the border between sound effects and actual musical instrum...
7: Electronic musical instruments are now widely used in most styles of music.
10:
12: ...strument was the [[Telharmonium]], built by [[Thaddeus Cahill]] in [[1906]]. Employing electric genera...
14: ...n RF field. This was followed in 1928 by the [[Ondes Martenot]] which had a keyboard as well as sever... - Crusade (28507 bytes)
1: {{Crusade}}
2: ...hars]] of southern France and the [[Northern Crusades]].
4: ...age of the term "crusade"|Usage of the term "crusade"]].
7: ...h the relative stabilization of local European borders after the Christianization of the [[Vikings]], ...
9: ... the Islamic [[Moors]]. In [[1063]], [[Pope Alexander II]] had given papal blessing to Spanish [[Chris... - Seed (4968 bytes)
4: ...nd [[radish]]. Plant seeds with an endosperm include all [[Pinophyta|conifer]]s and most [[monocotyled...
10: ..., inhibiting germination in some seeds buried too deeply or in others not buried in the soil. [[Abscis...
12: ...ered by the [[conifer cones|cone]] scales as they develop. An example of a hard fruit layer surroundin...
15: ...disperse by spores. However, seeds involve a considerably greater investment in energy and resources t... - Carnivorous plant (44834 bytes)
1: ...e ]]A '''carnivorous plant''' is a [[plant]] that derives some or most of its
16: *Bladder traps, which suck in prey with a bladder that generates an internal vacuum; and
22: most [[sundew]]s, whose leaves undergo rapid growth, aiding in the retention and
27: Pitfall traps have evolved independently on at least four occasions. The simplest pitf...
29: ...enus, the leaves are quite clearly evolutionarily derived from a simple - World War I (62979 bytes)
2: ...had roots of power back to the days of the [[Crusade]]s, all fell during or after the war.
4: The causes of World War I were complex developments by themselves (see [[#Diplomatic and po...
6: ...s the last direct major conflict of the war. The defeat of [[Germany]] in the war and failure to reso...
8: ...n diplomatic ineptitude as well as a tremendous tide of nationalism that swept the European continent ...
10: ... on the home front due to food shortages, [[genocide]], and ground combat. - Vietnam War (102682 bytes)
1: {| border="1" width="325" cellpadding="2" cellspacing="0" ...
10: ...outh Vietnam<br>• Reunification of Vietnam under communist rule<br>
15: ...n="top" style="text-align:center"|[[North Vietnam|Democratic Republic of Vietnam<br>(North Vietnam)]]<...
24: ...IA]]:''' ?<br>'''Total dead:''' 287,232<br>'''Wounded:''' 1,496,037
25: ...fficial Vietnamese estimate: 1,100,000 <br>'''Wounded:''' 600,000 - Thunderstorm (7337 bytes)
2: ...presence of [[lightning]] and its attendant [[thunder]]. It is often accompanied by copious rainfall,...
4: ...th's atmosphere|atmosphere]], reflected by high [[dewpoint]] temperatures; a significant fall in air [...
6: ...[Great Spirit]]. In more contemporary times, thunderstorms now have taken on the role of a curiosity....
9: ...cell, multi-cell, and supercell. Which type forms depends on the instability and relative wind conditi...
13: ...erstorm stages. In many cases the immature cells develop along a line known as a ''flanking line'', r... - Meditation (26064 bytes)
3: ...me calm and focused. Several major religions include ritual meditation; however, meditation itself nee...
5: ...se is the receipt of spiritual insights and new understanding.
10: ...t-clipart-9029.jpg|thumb|right|250px|Clipart provided by [http://classroomclipart.com Classroom Clip A...
12: ...and some people use repetitive activities such as deep breathing, humming or chanting to help induce a...
16: Besides the physical factors related to meditation perha... - Lightning (33113 bytes)
2: ...ning strokes are observed during a night-time thunderstorm.]]
6: ...e air, producing lightning's characteristic [[thunder]] sound.
10: ...but while waiting for its completion, he got the idea of using a flying object, such as a [[kite]] ins...
12: ...fallen during the storm had soaked the line and made it conductive.
14: ...ted the original high-object-with-some-spark-gap idea that they used, so he usually gets the credit. - Crossbow (7510 bytes)
2: ... European medieval warfare and is still used in modern times for various purposes.
4: ==Description==
5: ... depend upon lift as [[arrow]]s do. The stock and trigger of hand-held firearms may have been copied from c...
7: ...w. This consistent performance was part of what made the crossbow historically a significant force in ...
10: ...ich is held in place by a nut when the bolt is loaded and the cross bow is engaged (referred to as at ... - Tsunami (29462 bytes)
1: ...ami that struck [[Mal靝 in the [[Maldives]] on [[December 26]], [[2004]].]]
2: ...fects of a tsunami can range from unnoticeable to devastation.
4: ... [[ocean]]; it simply has a much smaller [[amplitude]] (wave heights) offshore, and a very long [[wave...
6: ...re not actually related to tides the term is considered misleading and its usage is discouraged by [[o...
10: ... tsunami by itself may trigger an undersea landslide quite capable of generating a tsunami. - Archery (18991 bytes)
5: ==Modern competitive archery==
9: ...competing with bows for millennia, the first recorded archery competitions began around [[1583]] in [[...
11: ...Internationale de Tir ࠬ'Arc). Olympic rules are derived from FITA rules.
17: ... An archer shoots between 3 and 6 arrows per end, depending on the type of round. After each end, the ...
19: ...ially lethal weapons, much attention is paid to order and safety. - Herbert Hoover (27123 bytes)
1: {{Infobox President | name=Herbert Hoover
4: | order=31st President
7: | preceded=[[Calvin Coolidge]]
8: | succeeded=[[Franklin D. Roosevelt]]
11: | dead=dead
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