4.3 bloedvatenstelsel

• Biologie
• Middelbare school
• havo
• Leerjaar 5

4.3 bloedvatenstelsel

Maak opgave 28.

bloeddruk

Hoe zorgt zout eten
voor een hoge bloeddruk?

bloeddruk meten

After calculating the pressure that a sauropod such as the approximately 80-foot-long Barosaurus would have required for blood to reach the dinosaur’s head (estimated at 700mmHg), Seymour and Lillywhite wrote that the left ventricle of the dinosaur’s heart alone would have weighed two tons, or about fifteen times heavier than the left ventricle of an equally-long fin whale. And even if such an enormous heart existed, the researchers reasoned, the organ would have been grossly inefficient. Such a monstrous heart seemed unlikely. Based upon their estimates and calculations, Seymour and Lillywhite concluded that sauropod dinosaurs probably had more reasonably-sized hearts and, therefore, did not have the pumping power to hold their heads high.

bloeddruk

stroomsnelheid

BINAS 84E

slagaders - hoge druk en
hoge stroomsnelheid.

haarvaten - Bloeddruk en stroomsnelheid nemen geleidelijk af.

aders - bloeddruk laagst, stroomsnelheid neemt toe.

Maak opgave 36 t/m 43.