Unit 3 Lesson 1 vocabulary

the smallest units that make up living things and are microscopic

• cells

• tissues

to move around in a loop or circle

• organs

• circulate

the actions or activities that something was designed to do

• circulate

• functions

major parts of the body formed by tissues that perform specific functions

• organs

• cells

masses of cells that have a specific structure and come together to form organs

• tissues

• cells