srce, krvni i limfni sudovi
TRANSCRIPT
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Srce, krvni i limfni sudovi
Damnjanović Ivana
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Srce
Snažan mišićni, šupalj organ Srčana maramica Između dva plućna krila, okrenuto ulevo
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2 pretkomore-gornje, manje šupljine 2 komore-donje, veće šupljine Zid leve komore-posebno razvijen
Leva pretkomora
Leva komora
Desna pretkomora
Desna komora
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Donja šuplja vena
Desne plućne vene
Leve plućne vene
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Srčana pregrada (lat. septum atrioventricularis), razdvaja desnu od leve strane srca
Deo pregrade između obe pretkomore naziva se međupretkomorna pregrada
Deo pregrade između obe komore naziva se međukomorna pregrada
Međupretkomorna pregrada
Srčana pregrada
Međukomorna pregrada
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Trodimenzionalni ehokardiogram vrha srca i srčanih zalistaka
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Rad srca nije pod uticajem naše volje Centar za rad srca se nalazi u produženoj moždini
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Srčani zalisci Srčani zalisci sprečavaju vraćanje krvi iz komora u
pretkomore Na desnom pretkomorno-komornom ušću je trolisni
(trikuspidalni) zalistak Na levom je dvolisni (mitralni)
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Aortin zalistak-otvor preko koga leva komora komunicira sa aortom
Plućni zalistak-otvor preko koga desna komora komunicira sa plućnom arterijom
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Plućni zalistak
Dvolisni zalistak
Trolisni zalistak
Aortin zalistak
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Krvni sudovi
Arterije, vene, kapilari
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Arterije
Odvode krv iz srca do vih delova tela Plućna arterija-odvodi krv u pluća Aorta-najveća arterija Aorta-arteriole-kapilari
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Vene Dovode krv u srce Venule se skupljaju u gornju i donju šuplju venu,
koje se uliva u desnu pretkomoru Plućne vene sprovode krv u levu pretkomoru
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Kapilari
Najmanji krvni sudovi Arterijski i venski deo
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Veliki krvotok
Veliki krvotok počinje u levoj komori iz koje polazi aorta
Ona raznosi oksidovanu krv po čitavom organizmu. U tkivima se ćelijama predaje kiseonik, a u krv ulazi ugljen - dioksid
Redukovana krv se šupljim venamašupljim venama vraća u desnu pretkomoru srca, a odatle ide u desnu komoru
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Mali krvotok
Mali krvotok počinje u desnoj komori iz koje polazi plućna arterija koja se zatim grana na levu i desnu arteriju koje redukovanu krv odnose u pluća
U plućima se krv oksiduje (otpušta se CO2, a prima O2) i vraća plućnim venama u levu pretkomoru
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Srce je otprilike veličine stisnute pesnice, čija težina varira od 300 do 350 grama
Za jedan minut, u toku 60 do 80 srčanih „otkucaja“ (kontrakcija), kroz srce protekne 5 do 6 litara krvi, što predstavlja minutni volumen srca, i ukupnu količinu krvi u organizmu
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Krvni pritisak
Sila kojom krv deluje na jedinicu površine krvnog suda
Sistolni-kontrakcija komore
Dijastolni-opuštanje srčanog mišića
120/80 mmHg
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Limfni sistem
Posrednik između krvi i tkiva
Limfni sudovi su po građi slični venama
Limfni kapilari-krupniji limfni sudovi-blizu srca se ulivaju u vene
Tok limfe je u jednom smeru (zalisci)
Limfni čvorovi (odbrana): ispod pazuha, na preponama, u grudnoj i trbušnoj duplji
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