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Jugar Test
1. 
Where does the oxygen pass into the blood?
A.
lungs
B.
stomach
C.
brain
D.
blood vessels
2. 
Which organ pumps blood to every parts of the body?
A.
lungs
B.
heart
C.
nerves
D.
stomach
3. 
Where do the nutrients pass into the blood?
A.
mouth
B.
esophagus
C.
small intestine
D.
large intestine
4. 
Which organ receives messages and sends instrucctions to the locomotor system
A.
heart
B.
brain
C.
lung
D.
liver