Cell Theory and Structure

What are the differences between a UNICELLULAR ORGANISM and a MULTICELLULAR ORGANISM?

• Unicellular organisms do not have DNA

• Multicellular organisms have cell walls

• Unicellular organisms are only one celled

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What does specialization mean?

• Each cell in the human body has the same job

• Some human cells have a membrane but others do not

• Cells have different sizes and shapes because they do different jobs

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The picture shows four types of tissues in the body. By looking at the picture, a tissue is:

• Similar cells that work in groups

• Cells that work alone

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Cell

• Made up of tissues that work together to preform a specific task

• Basic unit of life

• Made of cells that have the same shape and function

• Made up of organs that work together to preform a specific task

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Organ System

• Made up of organs that work together to preform a specific task

• Basic unit of life

• Made up of tissues that work together to preform a specific task

• Made up of cells that have the same shape and function

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Organ

• Made up of cells that have the same shape and function

• Made up of tissues that work together to prefrom a specific task

• Basic unit of life

• Made of organ systems that work together to sustain life

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Which of the following is the correct order of the Levels of Organization (smallest to largest)

• Cell, organ, organ system, organism, tissue

• Cell, tissue, organ, organ system, organism

• Organism, organ system, organ, tissue, cell

• Organ, cell, organism, tissue, organ system

Made up of cells that have the same shape and function

• Organ system

• Organism

• Tissue

• Organ

This system helps rids the body of wastes.

• excretory
• circulatory
• digestive
• endocrine

Which of the following is NOT one of the systems involved in producing movement?

• nervous
• muscular
• skeletal
• respiratory