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Cellular Hierarchy S7L2c Explain that cells are organized into tissues, tissues into organs, organs into systems and systems into organisms.

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Page 1: Cellular Hierarchy S7L2c Explain that cells are organized into tissues, tissues into organs, organs into systems and systems into organisms

Cellular Hierarchy

S7L2c Explain that cells are organized into tissues, tissues into organs, organs into systems and

systems into organisms.

Page 2: Cellular Hierarchy S7L2c Explain that cells are organized into tissues, tissues into organs, organs into systems and systems into organisms

Cellular HierarchyCells (Least complex)

Tissues

Organs

Organ systems

Organism (Most complex)

Page 3: Cellular Hierarchy S7L2c Explain that cells are organized into tissues, tissues into organs, organs into systems and systems into organisms

Unicellular

• Only one cell• The single cell carries out all life functions.• Examples– bacteria– amoebas

Page 4: Cellular Hierarchy S7L2c Explain that cells are organized into tissues, tissues into organs, organs into systems and systems into organisms

Multicellular• Composed of many cells• Cells group together and divide labor• Cells become specialized for specific functions• Cells take on special shapes because of special

jobs• Examples–blood cells, nerve cells, liver cells, muscle

cells, skin cells

Page 5: Cellular Hierarchy S7L2c Explain that cells are organized into tissues, tissues into organs, organs into systems and systems into organisms

Tissues• Cells grouped together to perform the same

function• Four basic types in the body– Epithelial tissue (skin, ducts, and tubes)–Connective tissue (cartilage and blood)–Muscle tissue (moves bones, digestive organs and

heart)–Nervous tissue (carries messages)

Page 6: Cellular Hierarchy S7L2c Explain that cells are organized into tissues, tissues into organs, organs into systems and systems into organisms

Organs

• Several types of tissues grouped together• Usually perform a complex task• Examples– Brain– Heart– Stomach – Lungs

Page 7: Cellular Hierarchy S7L2c Explain that cells are organized into tissues, tissues into organs, organs into systems and systems into organisms

Organ Systems

• Several organs working together for a particular function

• Examples–Digestive system–Circulatory system–Nervous system

Page 8: Cellular Hierarchy S7L2c Explain that cells are organized into tissues, tissues into organs, organs into systems and systems into organisms

Examples of Cellular HierarchyExamples of Tissues Examples of Organs Examples of

Organ Systems

Epithelial Skin integumentary

Nerve Brain nervous

Connective Heart circulatory

Muscle Biceps brachii muscular

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