Question

1. A closed circulatory system in which (1 point)
A) Blood spreads freely throughout all the body's tissues and organs.
B) Blood flows through a system of blood system throughout the body.
C) Blood travels through blood vessels into cavity's call sinuses.
D) Blood is pumped through a system of blood vessels and air sacs.
2. 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.
ETC.

Answer 1

may be it's 1)B&2)C...

Answer 2

i think 'c' is point