Q.1. What is heartbeat? Name the instrument used by doctors to check heartbeat of the patient.
Q.2. How does water enter into the root hair cells from the soil?
Q.3. Why do we breathe faster and why does our heart beat faster while exercising?
Q.4. Do all animals require a transport system for transporting food and oxygen? Give example.
Q.5. Different chambers of the heart are separated from each other by muscular septa. What happens if the muscular septa are absent?
Q.6. What makes RBCs red in colour and WBCs colourless?
Q.7. Differentiate among arteries, veins and capillaries.
Q.8. What do you understand by vascular system of plants?
Q.9. When doctors inject medicines directly to our bloodstream, where are these medicines injected - in artery or in vein?
Q.10. Study the figure given below and write down the correct words for labels (i) to (x).
Q.11. What happens if kidneys fail to function properly?
Q.12. How does sweating regulate body temperature?
Q.13. The process of removing waste materials from the body of an animal depends on the availability of water. Explain.
Q.14. What is the function of urinary bladder?
Q.15. What will happen if there are no platelets in the blood?
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