Question

Fill in the blanks:

1. Main excretory organ in human is ........

2. The excretory substance in fish is .............

3. .............help in blood clotting 

4. The main circulatory fluid in man is .............

5. .............. is an instrument to hear the heartbeat.

Answer 1

1. Main excretory organ in human is Kidney. 

2. The excretory substance in fish is Amonia. 

3. Blood Platelets help in blood clotting 

4. The main circulatory fluid in man is blood. 

5. Stethoscope is an instrument to hear the heartbeat.