Evolution of Heart and Aortic Arches

FVOLLITION OF HEART AND AORTIC Exarution of beaut ARCHES separation of right and left ateriors increasing separation of right & teft ventricle Deoxygenated blood oxygented blood reight side of the night left ede heart of the beave! 10 bret ancestral condition, seprecation & not complete structance like teratocresce help to separation. maintain - The arterial axches Bepply of vertebrate animals from the route to the frecue the 002 th embreajo aortic develop in associat con each of the developing pharongeal arcrhee - On the Ellcestication belted the basic ombryonce patieres of aortic circalafion is shown & the arches es Coveral Representatives of the veretebteate Fates of these majok gonupe Typical embreajenda bearet). Bereds Networch thier var Reptiles • Large returns theek wall Mammal? [stre-of evolution of heart Co vertebrate J Netorarek -Think usar Page nextin arches. from ane paired blond vellele that emerge me ventricles of the heart Aortic arcches from the dorsal blood. carry blood Ventral blood vessels. arches different is different vessels to the The no. of martie adult vertebrates. They built en the game fundamental plan. anesetral Vertebrates, the no. of acictic arches. heigh and variable. of coretic arches Extracoderm had. 30 اله 10 pairs vertebrates, goretic arches. symmetrical but in amnectes these in camphaoxus, there arce have & paire are bilaterally are cymaseymermicas 60 pairs of mortic arches. and on bagfiches the no of Lamprey comped arches arce 15 pairs. - go yowed vertebrates these Gereches found in the 6 pairs of acrefec embryo of all verttebrates. Comparative anatomy of aortic arches Aortic arches are pairced blood vessels that emerge from the ventricle of the heart and are basically in nop disposition in different veins during embryonic stages. Embryonce moretic arches :- During the embryonic stages arches 6 pairs of aortic develop in most gnathostomes and arce named ale to the of the vescerca) Clefte Dame Modification of antista arches in different The no of aortic arches is differcent on different adulp vertebrates but they built on the came fundamental plan in embryond life. The differences in the number of coretic veches are the complexity of heart circulation, which is the mode of living from aquatic to terereestreias Perem. Branchiostoma Camphioxces) has 60 pairs of aortic arches but petromyzon hau only has & pairs of corted arches. * pairs & myxčne Agrethe arches in fiber :- The They hearts of fecher have on that only resport are 2 chambered. ene retricem & one ventricle the foon hearet ressembles the embrajonic condition of all At the pectorcine end of the a thin rewalled space gathere othere vertebrate animall. hearet & the eanus veneru echerre blood from the veine before entering the atrium. Flashmobranchs :- The primitive crostic anches of aortie alashmobranchs has mreches. only 7 pairs of celaching has only & paire 350 Choucke Scorcodon, have 5 pries of functional anretie areches the ffrest pain is reeduced. Ne delappeared by the non. functional gelse. In etasmobranchs appercent bas one in each gell. and deproans reach aortic arches arstency and 2 efferrent aretereies [ Embryongo wasiels hard parereny [Fich In Feleests: - In teleoste, each 1 arch has one artery in each geln. afferent and one offereent Forng (Development of merete arches in In most teleosts arches auce bony fishes the let & and coretic tend to dieappear thes 6th paires of aortic only 3rd 4th, 5枚 arches remain functional. vertebrate) In polyplenue & Lung Fieries Coipnot DLLE to the aquatic to mede of Uving & reparation Arem terrestrial, the dieappeared thes there aertic arches which are Ist apretie anches ake, 3rd, 4th e.eth Functional. In amphibians: - The The freog & other amphibians have a chamberred hears. hearet has a deveded atrium regment. The reight atrium receives bleed from systemic circula- teen echile the left atricem xeceiver blood from the Junge. - Due to the presence of kengs as the main respemation resporcatorcy exegan, the dropcretante of geln de domeneched. 90 Urodels:- Focure paires of aeretic arches from 3red to 6 th are functional En general. The 5th paire is absent on scren, Amphiuma - The 3red paire forems carroted anterey & the 4th paire forems seyetemic arches." - The 6th paire forms the Sceppides blood pulmonary to skin & lunge aorta which 20 Anurant: At metamorphosie, coath 1000 of gill, 1st 12nd 25th aretic arches a&appear as togethere arches 3 rol. 4th & 6th -Thes 3 pains of corctic functional in general.