Question

Please Help !


A closed circulatory system is one in which (1 point)
A.blood spreads freely throughout all of the body’s tissues and organs.
B.blood flows through a system of blood vessels throughout the body.
C.blood travels through blood vessels into cavities called sinuses.
D.blood is pumped through a system of blood vessels and air sacs.

Answer 1

In the open circulatory system of some mollusks, blood is found (1 point)
A.in a double-loop and in sinuses.
B.in alveoli and blood vessels.
C.in blood vessels and sinuses.
D.in gills and tracheal tubes.

Answer 2

Please only post one question at a time :\ I'll help you with the 1st one though.

Answer 3

Do you know what Circulatory system is and does?

Answer 4

I got it now, thanks though.

Answer 5

Ok :) If you need help tell me

Answer 6

Alrighty