How's my target now! X Choose the letter that of the correct answer. Write your answer on a piece of paper 1. The blood comes back to the heart from the body through two big veins called the A ortas C. Pulmonary veins B. Right atria D. Vena cava 2. About how big is the size of a human heart? A. The size of your fist B. The size of your foot C. The size of your ear D. The size of your nose 3. Why is the white blood cell an important part of the body's immune system? A. They transport oxygen to the heart. B. They remove waste from the system. C. They allow any bacteria to enter the body. D. They defend against bacteria, viruses, and other infectious diseases 4 When you get a cut on your finger, what part of the blood helps clot the blood A Arteries C. Red blood cells D White blood cells need ko talaga guys​rt​​