Levels of Cellular Organization

Unicellular Organisms Have just one cell that do all of it’s life processes No levels of organization Advantages- need fewer resources, can survive in different environments Disadvantages- organism dies if one cell dies

Multicellular Organisms Cells are specialized (have a specific job) Larger Longer life span Need more resources to live Cells depend on each other to keep organism alive

Levels of Organization for Multicellular Organisms Cell  Tissue  Organ  Organ System  Organism Smallest  Biggest Least complex  Most complex

tissue Groups of similar cells working together 4 types: nervous, epithelial, connective, and muscle Nervous- messaging system for your body Epithelial- protective and forms boundaries (skin) Connective- holds body together, provides support and nourishment (bones & blood) Muscle- movement

What is plant Tissue? Read p. 191 in your book and complete the Venn diagram with the people at your table. Then answer the “Visualize It!” question.

Organs Tissues working together to perform a specific function Brainstorm a list of organs found in animals and plants Animals Plants

Organ Systems Groups of organs working together to perform a specific function Examples: digestive system, respiratory system

Structure and Function Structure-how it is arranged Function- what it does Answer the “Visualize It!” question on p. 194

Table 1- p. 195 “Can’t Touch This” Table 2- p. 195 “Blow on Your Food” Read and Explain to the class (How do the levels of organization effect organisms?) Table 1- p. 195 “Can’t Touch This” Table 2- p. 195 “Blow on Your Food” Table 3- p. 195 “Night Vision” Table 4- p. 196 “Visualize It!” Table 5- p. 197 “Visualize It!” Table 6- p. 197 “Delivering Nutrients” Table 7- p. 197 “Delivering Oxygen” Table 8- p. 197 “Removing Wastes”