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Sumario Sistema circulatorio (biología de 4to año)

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Resumen breve del sistema circularorio con esquemas e imágenes para guiarse (Cuando se muestra una f: significa función y cuando aparece una c: significa características

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SISTEMA CIRCULARTORIO
Funciones:

-transporte de oxigeno (de los pulm ones a tejidos y de dióxido de car bon o de los tejidos a los
pulm ones)

 distribución de nutrientes (sist. Digestivo hacia todas las células)
 -transporte de productos de desecho y sust. Toxicas (hacia el riñón)
 -distribución de hormonas
 -regulación corporal de la temperatura
 -defensa del organismo

Formado por:

1. El corazón
2. Los vasos sanguíneos (arterias, venas, y capilares)



EL CORAZON



Tiene tres capas:

 Pericardio = tejido fibroso y resistente (f: protectora)
 Miocardio = (f: se encarga de bombear la sangre)
 Endocardio = tejido delgado y liso (f: facilita el
desplazamiento de la sangre)

Está dividido en 4 cavidades:
 Aurículas = superiores, delgadas y pequeñas (f:
desembocan las venas trayendo sangre de retorno
desde los órganos de todo el cuerpo)
 Ventrículos = inferiores, grandes y gruesas (f:
expuksan las sangre que reciben las aurículas hacia
las arterias, las que distribuyen a todas las células del
cuerpo)




 Las mitades derecha e izquierda del corazón no se comunican entre sí debido a la presencia de un
tabique com pleto , evitando la mezcla de la sangre que circula por ambas mitades (sangre oxigenada
y no oxigenada).
 Cada aurícula se comunica con su ventrículo a través de un or ifi cio aur iculoven tr icular por el cual
desciende la sangre.

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Secondary school
Course
School year
4

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Uploaded on
October 24, 2024
Number of pages
4
Written in
2024/2025
Type
SUMMARY

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