Mastery Check #3 - Levels of Organization
Note: Your mastery check score will depend on your google slides presentation as well as an essay you write after listening to other peoples presentations.
Multicellular organisms can be very complex. To help us understand them, we break them down into different levels of organization. These are the levels or organization in complex organisms.
- Cells - Cells are the most basic structure of living things. There are different types of cells in humans:
- Skin cells, nerve cells, bone cells, blood cells, and muscle cells are a few examples.
- Tissue - this is a group of the same types of cells that work together in the body.
- Examples: Nervous tissue, epithelial tissue (these form linings around organs as well as our skin), muscle tissue, blood tissue, connective tissue.
- Organs - these are groups of tissues that work together in the body.
- Examples: Heart, Lungs, Brain, Stomach, Intestines, Kidneys, Liver
- Organ Systems - these are a group of organs that work together in the body
- Examples: Respiratory, Urinary, Nervous, Circulatory, Skeletal, Muscular
- Organism - this is a group of systems that work together to make the body.
- Examples: Animals and plants
There are 7 organ systems that we will focus on. These are the basic functions and parts for these systems:
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All systems depend on other systems to perform their function. Just like individual cells of multicellular organisms can't survive on their own, organs and organ systems can't survive on their own. Here are a few examples:
- The circulatory system depends on the nervous system because the brain controls the beating of the heart. There are nerves that travel from your brain to your heart to tell the heart to beat.
- The nervous system depends on the circulatory system because it needs the food and oxygen delivered by the blood. The blood also takes away waste produced by the brain.
- All systems depend on the circulatory, respiratory, and digestive systems to get food and oxygen to their cells.
- All systems depend on the urinary system to get ride of waste.
- The urinary system depends on the circulatory system to get rid of waste for them.
- The circulatory system depends on the muscular system to move blood around the body.
- All systems depend on the skeletal system to hold organs in place and to protect them. Example: your rib cage protects the heart and lungs.