I. IDENTIFY WHAT IS BEING DESCRIBED IN THE FOLLOWING. CHOOSE YOUR ANSWER FROM THE WORDS INSIDE THE PARENTHESIS)
1. THESE ARE THE MAIN ORGAN OF THE RESPIRATORY SYSTEM. (LUNGS, HEART)
2. IT IS A DOME-SHAPED MUSCLE THAT CONTROLS BREATHING, WHICH IS LOCATED AT THE BOTTOM OF THE LUNGS. (BRONCHIOLES, DIAPHRAGM)
3. IT IS THE PUMPING ORGAN OF THE CIRCULATORY SYSTEM. (HEART, BLOOD)
4. IT IS THE LIQUID MEDIUM THAT IS CONSTANTLY FLOWING THROUGHOUT THE BODY. (BLOOD, BLOOD VESSELS)
5. IT IS THE PRIMARY ORGAN OF THE CENTRAL NERVOUS SYSTEM. (BRAIN, HEART)

II. WRITE TRUE IF THE STATEMENT IS CORRECT AND FALSE IF IT IS NOT.
6. THE TRACHEA IS KNOWN AS WINDPIPE.
7. THE NOSTRILS ARE THE OPENING INTO THE NASAL PASSAGES THAT ARE LINED WITH HAIRS.
8. HEART IS REFERRED AS THE RIVER OF LIFE.
9. THE NERVE CELL IS THE FUNCTIONAL UNIT OF THE NERVOUS SYSTEM.
10. THE LUNGS RECEIVES AND INTERPRETS COUNTLESS SIGNALS.

III. ENUMERATE THE FOLLOWING.
11-13. 3 PARTS OF THE BRAIN.
14-16. 3 PARTS OF THE CIRCULATORY SYSTEM.
17-20 . GIVE 4 PARTS OF THE RESPIRATORY SYSTEM.






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