Answer the questions. 1. Are all blood vessels the same size? 2. Which type of blood vessel carries blood away from the heart? 3. Which blood vessels do body cells get food and oxygen from? 4. What happens to blood pressure when arteries are blocked with fat?

6. Cells produce energy from (a) muscles. (b) oxygen and food. (c) carbon dioxide.

पॉन्स व मेब्यूला किसके भाग हैं? (A) नर प्रजनन तंत्र (B) पत्तियों (C) मस्तिष्क (D) पुष्प

A. Fill in the missing word. 1. The raw materials your body needs are called (cells, nutrients) 2. Both cheeses and meats contain . (carbohydrate, protein) 3. Sugar is a kind of 4. For energy, your body uses (bones, carbohydrates) 5. Proteins are found in milk and

6. Carbohydrates are either starches or \( \begin{array}{lll}\text { (a) salts } & \text { (b) sugars } & \text { (c) fats }\end{array} \)

Fill in the missing words. 7. Breathing is 8. The heart has four 9. Red blood cells carry (waste, oxygen)