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Chapter: 3Section: 3 MULTICELLULAR ORGANIZATIONMade by: Taha Shorsh & paywast amanj

Tissues, Organs, and Organ SystemsA. Tissues

Tissues groups of cells that carry out a specific function.

Types of Tissues:1. Muscle tissue causes movement.2. Epithelial tissue sheets of closely-packed cells that form surface coverings.3. Connective tissue holds tissues/organs together.4. Nervous tissue transmits messages back and forth between the tissue and brain.

B. Organ Organ several types of tissues that interact to form a specific function. The Stomach is an example of an organ.

C. Organ Systems Organ System a group of organs that work together to perform a common task.The Digestive system is an example of an organ system

D. Plants also have tissues and organs, but their arrangementdiffers from that of animals.

Colonial Organizationa. Step 1: fossils suggest the earliest cells on Earth were simple prokaryotes similar to some present day bacteria.b. Step 2: Colonial Organisms several organisms of the same species working together for survival. Volvox is a perfect example; a hollow Volvox sphere contains 500 to 60,000 cells, each of which continues to exist individually but carry out specific functionsthat benefit the whole colony.C. Step 3: animals, plants, and fungi likely evolved from different varieties of colonial organisms hundreds of years ago. Cells became less capable of functioning by themselves as multicellular colonies became the norm.