PART 1: READING - Read below and summarize each paragraph. The cloud should containthe MAIN IDEA of each paragraph.

tissue is a house, an organ is like a city block. An organ's job is more complicated than a tissue's job, which is why it takes more than one kind of tissue. For example, the heart is the organ responsible for pumping oxygen-rich blood to the rest of your body. To do this, it needs all four kinds of tissue. Muscle tissue helps the heart pump blood through your body, and the nervous tissue receives signals from the brain about when to pump. The next largest level of organization smaller than your whole body is an organ system. Organ systems are groups of organs that work together to perform BIG jobs for your body. If an organ is like a city block, an organ system is like an entire neighborhood, like Back Bay. The circulatory (sir-cue-la-tore-ee) system is a good example. Your circulatory system performs a BIG job for the body - it transports materials we need, like food and oxygen, throughout our bodies. To do this, the system uses the heart to pump blood, and your blood vessels (for example, your veins) to carry the blood all over. We'll spend most of this unit learning all about organ systems! Taal 7 The largest level of organization is your whole body. This level is called the organism. Organisms can carry out all basic life processes. This means they can take in materials, release energy from food, release wastes, grow, respond to the environment, and reproduce. *When you finish complete the activities on pages 3-4