WGUbnA&Pbn1bnD312bnSectionb
1 n
1. Chemical:bnThebnhumanbnbodybnisbnmadebnupbnofbnatoms.bnOxygen,bncarbon,bnhydrogen,bnandbnnitrogenbnmakebnupbn96%bno
fbnthebnbody'sbnmass.bnTherebnarebn22bnotherbnelementsbnthatbnalsobncommonlybnoccurbninbnthebnhumanbnbody,bnsuchbnasbniron.
Atomsbncombinebntobnformbnmolecules,bnforbnexample,bnwater,bnglucose,bnandbnDNA
2. Cellular:bnThebnsumbnofbnthebnchemicalbnreactionsbninbnabncellbnmakesbnupbnitsbnstructurebnandbnfunction.bnOftenbnthesebnre
actionsbnarebnconfinedbntobnspecificbnregionsbnwithinbnabncell,bnknownbnasbnorganelles.
3. Tissue:bnTherebnarebnfourbnbasicbntypesbnofbntissuebngroupedbntogetherbnbybncommonbnfeaturesbnofbnstructurebnandbnfu
nction:bnepithelialbntissue
connectivebntissuebnmuscul
arbntissuebnnervousbntiss
ue
4. Organ:bnOrgansbnhavebnspecificbnfunctions
5. System:bnebnsystemsbnhavebnorgansbnthatbnarebninbndirectbnphysicalbncontactbnandbnthereforebnfunctionbntogether,bnsuchbnas
e
organsbnofbnthebndigestivebnsystem,bnbutbnothersbnarebnrelatedbnbybnfunctionalbnorbnstructuralbnsimilaritiesbnandbndobnnotbnhavebnd
ectbncontact,bnsuchbnasbnthebnglandsbnthatbnformbnthebnendocrinebnsystem.
6. Organism:bnEachbnbodybnsystembncarriesbnoutbnitsbnindividualbnfunctions,bnbutbnallbnofbnthesebnorganbnsystemsbnmustbnwo
togetherbnforbnthebnorganismbntobnoperatebnasbnabnwhole.
bn
bn
, WGUbnA&Pbn1bnD312bnSectionb
n1
7. organelles:bnanybnofbnseveralbnditterentbntypesbnofbnmembrane-
enclosedbnspecializedbnstructuresbninbnthebncellbnthatbnperformbnspecificbnfunctionsbnforbnthebncell
8. IntegumentarybnSystem:bnThebnintegumentarybnsystembnconsistsbnofbnthebnskinbnandbnthebnassociatedbnskinbnco
mpo-bnnents,bnsuchbnasbnhair,bnsweatbnglands,bnsebaceousbnglands,bnandbnnails.
9. IntegumentarybnSystembnFunction:bnProtectsbnthebnbodybnfrombnthebnexternalbnenvironment,bnexcretesbnmet
a-
b n bolicbnwaste,bnhelpsbntobnmakebnvitaminbnD,bnandbndetectsbnpain,bntouch,bndehydration,bnandbnchangesbninbntemperature.
10. Skeletalb n System:b n Thebnskeletalbnsystembnconsistsbnofbnthebnbonesbnandbnthebncartilagebnassociatedbnwithbnjoints
11. SkeletalbnSystembnFunction:bnProtectsbnthebnbody,bnprovidesbnsupportbnandbnabnframeworkbnforbnmusclesbntobn
t
upon,bncontainsbnbonebnmarrowbnforbnbloodbncellsbntobndevelopbnin,bnandbnstoresbnmineralsbnsuchbnasbncalcium.
12. MuscularbnSystem:bnThebnmuscularbnsystembnconsistsbnprimarilybnofbnskeletalbnmuscle,bnbutbntherebnarebnalsobntw
obnotherbntypesbnofbnmuscle:bncardiacbnmusclebnfoundbninbnthebnheartbnandbnsmoothbnmusclebnfoundbnwithinbnthebnviscera,bnincluding
bn thebnalimentarybncanalbnandbnthebnwallsbnofbnbloodbnvessels.
13. Muscularb n systemb n Function:b n Enablesbnthebnbodybntobnmovebnbybnthebnactionbnofbnopposingbnmuscularbncon
ction
andbnrelaxation.bnItbnalsobnmaintainsbnposturebnandbnplaysbnabnrolebninbnthermoregulation
bn
bn
1 n
1. Chemical:bnThebnhumanbnbodybnisbnmadebnupbnofbnatoms.bnOxygen,bncarbon,bnhydrogen,bnandbnnitrogenbnmakebnupbn96%bno
fbnthebnbody'sbnmass.bnTherebnarebn22bnotherbnelementsbnthatbnalsobncommonlybnoccurbninbnthebnhumanbnbody,bnsuchbnasbniron.
Atomsbncombinebntobnformbnmolecules,bnforbnexample,bnwater,bnglucose,bnandbnDNA
2. Cellular:bnThebnsumbnofbnthebnchemicalbnreactionsbninbnabncellbnmakesbnupbnitsbnstructurebnandbnfunction.bnOftenbnthesebnre
actionsbnarebnconfinedbntobnspecificbnregionsbnwithinbnabncell,bnknownbnasbnorganelles.
3. Tissue:bnTherebnarebnfourbnbasicbntypesbnofbntissuebngroupedbntogetherbnbybncommonbnfeaturesbnofbnstructurebnandbnfu
nction:bnepithelialbntissue
connectivebntissuebnmuscul
arbntissuebnnervousbntiss
ue
4. Organ:bnOrgansbnhavebnspecificbnfunctions
5. System:bnebnsystemsbnhavebnorgansbnthatbnarebninbndirectbnphysicalbncontactbnandbnthereforebnfunctionbntogether,bnsuchbnas
e
organsbnofbnthebndigestivebnsystem,bnbutbnothersbnarebnrelatedbnbybnfunctionalbnorbnstructuralbnsimilaritiesbnandbndobnnotbnhavebnd
ectbncontact,bnsuchbnasbnthebnglandsbnthatbnformbnthebnendocrinebnsystem.
6. Organism:bnEachbnbodybnsystembncarriesbnoutbnitsbnindividualbnfunctions,bnbutbnallbnofbnthesebnorganbnsystemsbnmustbnwo
togetherbnforbnthebnorganismbntobnoperatebnasbnabnwhole.
bn
bn
, WGUbnA&Pbn1bnD312bnSectionb
n1
7. organelles:bnanybnofbnseveralbnditterentbntypesbnofbnmembrane-
enclosedbnspecializedbnstructuresbninbnthebncellbnthatbnperformbnspecificbnfunctionsbnforbnthebncell
8. IntegumentarybnSystem:bnThebnintegumentarybnsystembnconsistsbnofbnthebnskinbnandbnthebnassociatedbnskinbnco
mpo-bnnents,bnsuchbnasbnhair,bnsweatbnglands,bnsebaceousbnglands,bnandbnnails.
9. IntegumentarybnSystembnFunction:bnProtectsbnthebnbodybnfrombnthebnexternalbnenvironment,bnexcretesbnmet
a-
b n bolicbnwaste,bnhelpsbntobnmakebnvitaminbnD,bnandbndetectsbnpain,bntouch,bndehydration,bnandbnchangesbninbntemperature.
10. Skeletalb n System:b n Thebnskeletalbnsystembnconsistsbnofbnthebnbonesbnandbnthebncartilagebnassociatedbnwithbnjoints
11. SkeletalbnSystembnFunction:bnProtectsbnthebnbody,bnprovidesbnsupportbnandbnabnframeworkbnforbnmusclesbntobn
t
upon,bncontainsbnbonebnmarrowbnforbnbloodbncellsbntobndevelopbnin,bnandbnstoresbnmineralsbnsuchbnasbncalcium.
12. MuscularbnSystem:bnThebnmuscularbnsystembnconsistsbnprimarilybnofbnskeletalbnmuscle,bnbutbntherebnarebnalsobntw
obnotherbntypesbnofbnmuscle:bncardiacbnmusclebnfoundbninbnthebnheartbnandbnsmoothbnmusclebnfoundbnwithinbnthebnviscera,bnincluding
bn thebnalimentarybncanalbnandbnthebnwallsbnofbnbloodbnvessels.
13. Muscularb n systemb n Function:b n Enablesbnthebnbodybntobnmovebnbybnthebnactionbnofbnopposingbnmuscularbncon
ction
andbnrelaxation.bnItbnalsobnmaintainsbnposturebnandbnplaysbnabnrolebninbnthermoregulation
bn
bn
