IMSO 2018 Science International - Theory I Question 13

The diagram below shows the different systems of the body.
Which one of the following correctly identifies the systems of the body?
W
X
Y
A.
Circulatory System
Digestive System
Respiratory System
B.
Digestive System
Circulatory System
Respiratory System
C.
Circulatory System
Respiratory System
Digestive System
D.
Respiratory System
Circulatory System
Digestive System
Key:
High in oxygen
Low in oxygen
W
X
Y
digested
food
will digested
food
different parts of
the body