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Life Science Review 1: Levels of Biological Organization

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Levels of Biological Organization (Benchmarks: &

Created Date 03.05.18
Last Updated 03.05.18
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  • A group of organs that work together to perform a major function. They function with one another on the same type of job. (Examples: Circulatory System, Respiratory System, Digestive System, Nervous System, Skin (Integumentary System), Urinary
  • Basic unit of structure and function of all living things (Example: Red Blood Cell)
  • Tissue, organs, and organ systems are composed of cells and function to serve the needs of all cells for food, air and waste removal.
  • A group of similar cells that perform the same function (Examples: Nervous tissue, Muscle tissue, Skin is made of epithelial tissue, Blood is a type of connective tissue)
  • Structures that are composed (made) of different kinds of tissue that perform (do) a specific job (Examples: Heart, Kidneys, Lungs, Bladder, Liver
  • True or False: Different cells have different jobs.
  • True or False: Nerve cells (neurons) and skin cells do NOT look the same because they are part of different organs and have different functions.
  • These cells provide protection.
  • These cells carry oxygen to other cells and carbon dioxide away from other cells
  • These cells contract and relax.
  • These cells receive and transmit signals
  • This system transports the nutrients from the food throughout the body via the blood.
  • This system brings in oxygen that the body combines with the nutrients from food to create energy and removes the carbon dioxide produced by this process.
  • This system breaks down and processes food that is eaten by animals.
  • This system might detect that an animal is hungry. The brain sends a signal to the body to eat.
  • This system eliminates waste that is generated by the body.
  • What organ system includes many organs, such as the stomach, small intestine, large intestine, liver, and pancreas. All of these organs work together to process food.
  • True or False: Organ systems work together to help vertebrate organisms survive (remember, vertebrate organisms are those with a backbone, like animals).