krvožilje Flashcards

1
Q

Kri je

A

krvna plazma 56% + krvne celice 44%

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2
Q

KRVNA PLAZMA je

A

rumena tekočina, večinoma iz vode

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3
Q

naloga krvne plazme

A

prenaša v vodi topne snovi ()hranilne snovi, hormoni, encimi

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4
Q

3 tipi krvnih celic

A

*rdeče krvničke - eritrociti
*bele krvničke - levkociti
*krvne ploščice - trombociti

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5
Q

ERITROCITI - rdeče krvničke

A
  • nimajo jedra, na sredini vbočene,vsebujejo moleulo HEMOGLOBIN
    -prenos kisika iz plučnih mešičkov do vseh celic telesa
  • krvne skupine: A, B, AB, 0
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6
Q

LEVKOCITI - bele krvničke

A
  • večje od eritrocitov
  • obramba telesa pred škodljivimi mikroorganizmi in tujimi snovmi
  • večje št. levkocitov = okužba
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7
Q

TROMBOCITI - krvne ploščice

A
  • mašijo rane
  • sodelujejo pri strjevanju krvi
  • preprečujejo prevelike izgube krvi
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8
Q

KRVNE ŽILE

A
  • arterije - odvodnice
  • vene - dovodnice
  • lasnice - kapilare
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9
Q

ARTERIJE - odvodnice

A
  • močne, prožne, elastične
  • kri bogata z O2 - svetlordeča —-> telesni krvni obtok
  • ob kosteh (zaščita)
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10
Q

VENE - dovodnice

A
  • močne, mlahave, z venskimi zaklopkami
  • kri bogata z CO2 - temnordeča —> telesni krvni obtok
  • tik pod kožo
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11
Q

KAPILARE - lasnice

A
  • tanke, iz ene plasti celic, izbirno prepustne —> izmenjava snovi in plinov med krvjo in okolico
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12
Q

SRCE

A

slika v zvezku

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13
Q

VELIKI krvni obtok

A

srce - telo - srce
kri celicam odda O2 in se bogati z CO2

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14
Q

MALI krvni obtok

A

srce - pljuča - srce
kri pljučnim mešičkom odda Co2 in se bogati z O2

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15
Q

krvni sistem je…
mali in veliki obtok sta…

A

sklenjen
sklenjena

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16
Q

bolezni/poškodbe (7)

A
  • visok krvni tlak
  • ateroskleroza
  • srčna kap
  • krčne žile
  • hemofilija
  • levkemija
  • slabokrvnost