The Human Body Organs & Their Functions

Today, iwe iwill isee ithe imajor iorgans iof ithe ihuman ibody. iI iwill icover ithe iheart, ithe ispleen, ithe ilungs, ithe ipancreas. iI'll icover ithe iliver, ithe ilarge iintestines, ithe ismall iintestines, iand ithe ikidneys. iLet's iget istarted.

Firstly, iI'd ilike ito italk iabout ithe iheart, iOur iheart ias ia ivery iimportant ijob. iIt ipumps iblood ithroughout iyour ibody. iThe iblood icarries ioxygen, iglucose iand iother inutrients ito ieach icell ito iremove iwaste ilike icarbon idioxide. iThe iheart iis icomposed iof ifour ichambers.  iThe itop ichambers iare icalled ithe iatrium, iand ithe ibottom ichambers iare icalled iventricles iin ibetween ieach ichamber iare ivalves. iThe ivalves icontrol ithe iflow iof ithe iheart. iThe iblood iflows iin ione idirection ibut istops ithe iflowing iblood iin ithe iopposite idirection. iThe iheart iis imade iup iof icardiac imuscle iand ipumps i24 ihours ia iday. iNow ilet's itake ia ilook iat ithe iflow iof iblood ithrough iyour iheart.

 iSecondly, iwe iwill isee ia ivery iimportant iorgan, ithe ilungs. iThe ilungs ibelong ito ithe irespiratory isystem. iThe irespiratory isystem ibreathes iin ioxygen ifrom ithe iatmosphere iand ithen itransfers ithis ioxygen iinto ithe ibloodstream. iIt ialso ihelps ithe ihuman ibody irelease icarbon idioxide ifroblood ifrom ithe ilower iparts iof ithe ibody ienters ithe iheart ithrough ithe iinferior ivein iand ifrom ithe ihead iand iupper iparts iof ithe ibody ito ithe isuperior ito ia icap. iThese iboth ilarge iveins iempty iinto ithe iright iatrium. iThe iblood ithen ipasses ithrough ithe itrack iCUSP ivalve iand iinto ithe imuscular iright iventricle. iThe iright iventricle icontracts ithe iblood ithrough ithe ipulmonary ivalve iinto ithe ipulmonary iarteries, ithese iarteries ilead ito ithe ilungs. iIn ithe ilungs, icarbon idioxide iis iexchanged ifor ioxygen, iand ithe iblood ireturns ito ithe ileft iside iof ithe iheart. iBy iway iof ithe ipulmonary iveins, iit ienters ithe ileft iatrium iand ithen ipasses ithrough ithe ibike ihusband ivalve iand iinto ithe ilargest iin istrongest ichamber ithe iheart. iwhen ithe ileft iventricle icontracts, ithe iblood iis ipushed ithrough ithe iaortic ivalve iand iinto ithe iaorta, iwhich iis ithe ilargest iblood ivessel iin ithe ibody. iThe iblood itravels ithroughout ithe ibody, iand ithis icycle irepeats iitself. iI ihope ithat ihelps iwith iunderstanding iScience.m ithe ibloodstream iinto ithe iatmosphere. iEverybody ihas itwo ilungs, ia ileft, iand ia iright ilung, iand ithey iare ilocated ibeside ithe iheart. iThe iheart ipumps iblood ito ithe ilungs, iwhere ioxygen, ithis iexchange ifor icarbon idioxide.

The iright ilung iis ilarger ithan ithe ileft ilung iand ithe ilungs iweight iaround ithree ipounds. iAir itravels idown ithe itrachea iand iinto itwo itubes icalled ithe ibronchus. iEverybody ihas ia ileft iand iright ibronchus. iThe ibronchus ibranches iinto ieven ismaller itubes icalled ibronchioles. iAt ithe iend iof ithe ibronchioles iare itiny iair isex icalled ialveoli. iAt ithe ialveoli, ioxygen iis iexchanged ifor icarbon idioxide. iThe ioxygen iand icarbon idioxide idiffuse iinto iand iout iof iyour iblood. iBecause ithe ilungs ihave imillions iof ialveoli. iThe ilungs iare ialso idivided iinto isections icalled ilobes. iYour iright ilung ihas ithree ilobes iin iyour ileft ilung ihas itwo ilobs. iThe iautonomic inervous isystem icontrols ithe irate ithat ithe ilungs iinflate iand ideflate ithe ilungs. iWhen ithe idiaphragm imoves idown, ithe ilungs iinflate iand iWhen ithe idiaphragm imoves iup, ithe ilungs ideflate, iaround i10 ito i20 itimes ia iminute. iThe ibreathing, iLet's iexchange ioxygen, ioxygen ifor icarbon idioxide. iIt iseems ilike ia isponge, iOregon. i

Thirdly, iwe iwill istudy ithe ifunctions iof ithe ispleen. iThe ispleen iisn't iorgan isituated iin ithe itop ileft iof ithe iabdomen iand ileft iof ithe istomach. iThe ispleen iis iabout ithe isize iof ia human ifist iand ihas ia ipurple icolor iand iis iabout ifour iinches ilong. iThe ispleen ihas ivarious ifunctions. 

First, iit ifilters iblood. iIt iactually iThere's ia ifilter ifor iblood ias ipart iof ithe iimmune isystem. iThe ired iblood icells iare irecycled iin ithe ispleen, iand iplatelets iand iwhite iblood icells iare istored. iSecondly, ithe ispleen iholds ia ireserve iof iblood iin icase iof isignificant ibleeding, imuch ilike ia iblood-filled iballoon. iThe ispleen ialso ihelps ithe iimmune isystem ito irecognize iand iattack iforeign ipathogens iand iother iallergens. iThe iinteresting ifact iwhile imost ipeople iare isomewhat ihealthier iwith ia ispleen, iit iis iabsolutely ipossible ito ihave ia inormal ilife iwithout ia ispleen. iSecondly, iwhen idamaged ior iwhen iyou're ifighting ia iseries iof iinfections, ithe ispleen ican ienlarge ifrom ithe isize iof ia isoftball ito ithe isize iof ia ivolleyball. iIt ibecomes ivery itender ican ibe idangerous. iThere iwe igo. iThat's iour ispleen, ia ismall iOregon ithat istill imatters iin iscience. i

Fourthly, iwe italk iabout ithe ipancreas. iThe ipancreas iisn't iOregon ilocated iin ithe iabdominal iarea. iLet's itake ia ilook iat iits ilocation iand iwhat iit ilooks ilike iis ian iOregon iabout ithe isize iand ishape iof ian iaverage ibanana. iIt isits ibehind ithe istomach. iThe iopening iof ithe ipancreas iattaches ito ithe ifirst ipart iof ithe ismall iintestine. iThe ipancreas ihas itwo iimportant iroles iin ithe ihuman ibody. iFirst, iit ihelps iwith idigestion. iAfter ifood ienters ithe itop iof ithe ismall iintestine, ithe ipancreas isecretes ia iclear iwatery isubstance ithat icontains iseveral ienzymes.

These ienzymes ihelp idigest iproteins, icarbohydrates, iand ihelps iconvert ifat iinto ifatty iacids iand icholesterol. iSecondly, ithe ipancreas ihelps imaintain iour iblood isugar ilevels iby isecreting ihormones. iblood iglucose ilevels imust ibe imaintained iwithin icertain ilimits iso ithat ithere's ia iconstant isupply iof isugar ito ifeed ithe isales, ibut inot itoo imuch iso ithat ithe ikidneys iand iother iorgans iaren't idamaged. iThe ipancreas iproduces itwo ihormones ito ihelp icontrol ithe iblood isugar. iThe ifirst iis iglucagon. iGlucagon iraises iglucose ilevels iby istimulating ithe iliver ito imetabolize iglycogen iinto iglucose imolecules. iAnd ithen ithis iglucose iis ireleased iinto ithe iblood. iThe isecond ihormone iis iinsulin. iThis ihormone ilowers iblood iglucose ilevels iafter ia imeal iby iinvigorating ithe iabsorption iof ithe iglucose iby ithe iliver, ialong iwith imuscles iand ifat itissue. iSo ithe ipancreas ihas ivery iimportant irole, ihelps iwith idigestion, iand ialso ihelps iregulate ithe iheart.

iFifthly, iwe italk iabout ithe iliver. iThe iliver iis ithe ilargest imain iorgan iof ithe ihuman ibody. iIt iis ivery iimportant ito iall iliving ithings ithat ihave ia iliver iand inobody ican ibe ilive iwithout ia iliver. iThe iliver ihas imany ifunctions. iIt ihelps iin idigestion, istores iimportant inutrients iand iis ia imanufacturing iplant. iThe iliver istores ia igreen isubstance icalled ibio iis iused iin ithe ilarge iintestines ito ihelp ibreak idown ifats. iBio iis istored iin ithe igall ibladder, iwhich iis ifound iright iunderneath ithe iliver. 

The iliver ialso ihelps ito idetoxify. iFor iexample, iit idetoxes, ialcohol, iand iconverts iammonia iinto ia iless itoxic ione. iDuring iexercise, ithe iliver ibreaks idown iglucose ithat iit istores iinto iglycogen ithat ican ibe iused ias ienergy iis istored ivitamin iB i12, iiron iand icopper. iIt iproduces iblood-clotting iproteins iand imany ihormones. iIt ialso ihelps ithe iimmune isystem. iHere iare isome imore ifunctions iof ithe iliver. iThe iliver iis ia isuperstar iOregon iand iworks ihard ito ikeep ius ialive.

iSixthly, iwe italk iabout ithe ismall iintestines. iThe ismall iintestines iare ia imajor isite iof idigestion ifor ius, iafter ibeing iconverted iinto ia isoupy imaterial iin ithe istomach icalled itime iour ifood imoves iinto ithe ismall iintestines. iThe ismall iintestines iare ilong. iIn ifact, iit iis iroughly ithree itimes iyour iheight ior iaround i18 ifeet iin ilength. iIt iis idivided iinto ithree isections. 

The itop ipart iis icalled ithe iDuodenum. iIt iis iroughly ia ifoot iin ilength. iThe imiddle isection iis icalled ithe i iJejunum iand iit iis iseven ifeet iin ilength. iAnd ithe ilongest isection iis ithe iIleum. iThe ismall iintestine icarries iout itwo imain ifunctions iin idigest iand iabsorbs. iIn iorder ito idigest ifood. iIn ithe iintestines, ithe igallbladder ireleases ibile iinto ithe ismall iintestine. iThis ifile ihelps ito ibreak idown ifat. iIn iaddition, ithe ipancreas isecretes ia idigestive ienzyme iinto ithe iintestines ithat ihelps ito ibreak idown iproteins. iAll ithis ioccurs iin ithe itop ipart iof ithe iintestines. iThe iwalls iof ithe ismall iintestines ihave ifinger-like iprojections icalled ifeline ithat ihelp iabsorb inutrients ithat iand ithen ithese inutrients ipass idirectly iinto ithe ibloodstream. iMuch iof ithis iabsorption ioccurs iin ithe isecond ihalf iof ithe iintestines. iFrom ithe ismall iintestines, ifood ipasses ito ithe ilarge iintestines, iwhere iwater iis isome imath iand iscience. i

Seventhly,we istudy ithe ilarge iintestines. iAfter ipassing ithrough ithe ismall iintestines, ifood itravels iinto ithe ilarge iintestines. iYour ilarge iintestines iare iroughly inine ifeet iin ilength ibut igets iits iname ibecause iit ihas ia ilarger idiameter iand ithe ismall iintestines. iThe ilarge iintestine iis ialso icalled ithe icolon. iThe ilarge iintestine iis idivided iinto iseveral isections. iThe ibeginning isection iis icalled ithe isecret ifood ifrom ithe ismall iintestine itravels ito ithe isecret. i

The isecret iis ia ilittle ilike ia ipouch iand ireceives ifood imaterial icalled itime ifrom ithe ismall iintestines iat ithe iileum ifrom ithe icecum, ifood itravels iupward iinto ithe icolon, iwater iand isalt iis iabsorbed iin ithe icolon. iThe inext isection iis ia icurved isection icalled ithe isigmoid. iThe ifood ithat ionce iwas itime ihas inow ibeen iconverted iinto ifeces, iand iit iis istored iin ithe isigmoid iand iit itravels ito ithe irectum iand ithen iexits ithe ibody. iOne iof ithe imain ijobs iat ithe ilarge iintestine iis ito iabsorb iwater. iVitamin iK iis iproduced iwith ithe ihelp iof ibacteria. iVitamin iK ihelps iyou iclot iblood, iit ihelps ito ibuild ibonds, iand iit iaids iin ikeeping iyour iinsulin ilevels icorrect. iSo ithey iare ithe ilarge iintestines. iAnother istop ialong iwith ithe idigestive iin iscience.

 iLastly, iwe italk iabout ikidneys. iThe ikidneys iare ito ibeing ishaped iOregon's ifound ion ithe ileft iand iright iside iof iyour ivertebrae. iThe ikidneys iare iimportant iorgans ibecause ithey ifilter iyour iblood.Your iblood ipasses ithrough ithe ikidneys i20 ito i25 itimes ieach ihour. iThe irenal iartery idelivers iblood ito ithe ikidney iand ithe irenal ivein imoves iblood iaway ifrom ithe ikidneys.

You ihave itwo ikidneys ias ithe iblood ipasses ithrough iyour ikidneys, ithe ikidneys iremove iwaste imaterial ifrom ithe iblood iand iit iis ialso ireleasing ior iholding ion ito iwater iand isalt. iYour ikidneys ialso ihelp icontrol iyour iblood ipressure iand ican istimulate ithe ibone imarrow ito imake imore ired iblood icells iattached ito ieach ikidney ior ito itwo ishaped itubes, icalled ieuro icenters, iand ithey icarry ithe iwaste imaterial ifrom ithe ikidney ito ithe ibladder. iThe iwaste ithat ifilters iout iby ithe ikidney iis icalled iurine. iThis itravels idown ithe iureter iand iinto iyour ibladder. iWhen ithe ibladder ifills iup, iit isignals iyour ibrain ithat iit iis itime ito igo ito ithe irestroom. iThese itwo ibeen ishaped iorgans ifound iby iyour ivertebrae iare ivery iimportant ifor ikeeping iyour iblood iand iyour ibody iclean ifrom iwaste.