09 The term cardiac refers to which organ in the body? 1. heart 2. vein 3. lymph 4. capillary

11 Which structures of the heart control the flow of the blood? 1. arteries 2. veins 3. valves 4. capillaries

13 An aphid pierces its proboscis into the ........ to get plant juices 1. xylem 2. phloem 3. cambium 4. vascular bundle