1. Why is brain important in the nervous system?
A.Because it is the control center or the body.
B.Because it pumps blood to the different parts of the body .
C.Because it collects and carry nerve impulse
D.Because it control our emotions.




2.What is the work of uninary bladder in the excretory system?
A.It filter and cleans the blood to remove waste substance from the body.
B.It is a passage of liquid wasted from the kindly .
C.It helps regulate the outflow of urine .
D.It is temporary storage of urine before going out out of the body.



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