Prepare to Read
Learn Key Vocabulary
Rate and Study the Words Rate how well you know each word. Then:
1. Pronounce the word. Say it aloud several times. Spell it.
2. Study the example.
3. Tell more about the word.
4. Practice it. Make the word your own.
Key Words
cell (sel) noun page 273 A cell is the smallest working part of a living thing. People are made up of millions of cells. Related Word: cellular | circulate (sur-kū-lāt) verb page 279 When something circulates, it moves along a path that returns to the place it started. Blood circulates throughout your body. Related Words: circle, circuit | examine (ig-zam-un) verb page 273 When you examine something, you look at it very closely. A doctor examines you to make sure you are healthy. Related Words: examination, exam | ||||||
involve (in-vahlv) verb page 276 To be involved means to be part of something. A team involves people working together. Synonym: include Related Word: involvement | organ (or-gun) noun page 273 An organ is a body part that has a certain job to do. Your heart and lungs are important organs. | oxygen (ahk-si-jun) noun page 276 Oxygen is the air we breathe. We use extra oxygen to exercise. | ||||||
system (sis-tum) noun page 272 A system is a group of parts that work together to do a job. People use a system of roads to drive to places more quickly. | vessel (ves-ul) noun page 279 A vessel is a tube through which liquid travels in a living thing. The vessels in a plant deliver water to the leaves. | Practice the Words Make an Example Chart with each Key Word. Share your chart with a partner.
Example Chart |