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Zusammenfassung Entwicklung des Herzens $5.83
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Zusammenfassung Entwicklung des Herzens

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Zusammenfassung aus Vorlesungen und Büchern im Fach Anatomie zum Thema Herzentwicklung.

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  • December 12, 2023
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  • 2022/2023
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Herz
- Lage im Mediastinum (Mittlern unteren)
> intrathorakal




Italiener
Entwicklung




Attenden
15. Tag
- primitive Herzanlage aus Blut-& Endothelzellen
- durch Abfaltung des Embryos entstehen 2 hufeisenförmige Endokardschläuche




vom
21. Tag
- 3. Keimblatt entsteht (Mesoderm)
- nach Verschmelzung entsteht x-förmiger Herzschlauch
—> wird im Verlauf v. Myokard umhüllt
28. Tag
- durch schnelles Längenwachstum + Krümmung Herzschlauchs (im begrenzten Raum d.
Perikardhöhle)
—> „Schleife“ entsteht (Septen) ↳


50. Tag ⑳
- durch weitere Drehung+ Septierung in einzelne Abschnitte entsteht Herz mit Vorhöfen,
Kammern, Gefäßen
- dieses Herz ähnelt Herz bei Geburt
Vor
- bei Geburt: - Lunge aufgebläht
- Widerstand in Blutgefäßen steigt
> mehr Volumen (Blut) —> Vorhofdehnung
> Foramen ovale wird verschlossen (verwächst nach Tagen)

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