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Überblick über Blut und dessen Bestandteile
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Überblick über Blut und dessen Bestandteile
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Blut• Welche Funktion haben Blutzellen
• wie läuft der Transport des Blutes ab?
• Wie sind Blutzellen aufgebaut?
Funktion des Blutes:
• Transport von Stoffen (Nährstoffe, Ergänzungsstoffe, Atemgase, Hormone…)
• Transport von Wasser
• Teil des Immunsystems (wehrt Infektionen
• Wundverschluss
• Regulation der Körpertemperatur
Bestandteile des Blutes:
Blut
(ca. 5-6l)
Blutplasma Blutzellen
(55%) (45%)
Rote Blutzellen Blutplättchen
Weiße (Thrombozyten)
(Erythrozyten) Blutzellen
(Leukozyten)
Wasser mit gelösten Stoffen:
Plasproteine (Abwehrproteine und
Gerinnungsproteine) Mineralstoffe,
Nähstoffbausteine Abfallstoffe,
Botenstoffe und Atemgase
Erythrozyten Leukozyten Thrombozyten
Anzahl pro ml 4300 mil 4.000.000-10.000.000 50 Mil - 400 Mil
4,3 Mrd - 4,8 Mrd. 4 Mil- 10 Mil
Funktion Versorgung der Abwehr von Zusammen mit
Gewebe mit Sauerstoff, körperfremden Stoffen Gerinnungsprotein
Abtransport von CO2 und Zellen Wundverschluss
Bildungsort Rotes Knochenmark Lymphknoten, Milz Im Knochenmark
Lebensdauer 80-120 Tage Wenige Tage 8-12 Tage
→mehreren Jahren
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