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Multicellular Organisms

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- Multicellular organisms are made of multiple cells working together.
- Groups of cells form tissues that are specialized for certain functions.
- Body systems work together to help us survive.
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Discussion Questions
- Before VideoWhat are some examples of organs we might find in animals? ANSWER
Brain, heart, liver, lungs, kidney
Roots, stem, leaves, pistol
Yes, all animals have a nervous system of some kind. The nervous system includes the brain, and the brain allows you to see, touch, taste, smell, and hear things.
Animals have blood vessels and veins. Plants also have veins, but their veins carry water and animal veins carry blood.
Multicellular organisms are living things that are made up of many cells. [Accept any examples of multicellular organisms.]
Multicellular organisms need food and water to stay alive. They also need the various parts of their body to work together to keep them healthy.
- After VideoHow do the various parts of the body work together when we eat something?ANSWER
When we eat something, food travels through our digestive system, which includes our mouth, stomach, intestines, and other organs. After food is digested, our bodies use it for energy and to help us stay healthy. We eliminate food we don’t need as waste through our excretory system.
Plants have different parts that need to work together, but they are different from animal parts. Plants get their energy and make their food using the Sun, and animals need to eat to get energy.
Our body is made of cells, cells work together to form tissue, tissues make up organs, organs make up our body’s subsystems, and all the subsystems work together to keep our body system alive and healthy.
Our sense receptors are found in our eyes, ears, tongue, skin, and nose. We need sense receptors for our various senses to work. They are also part of the nervous system.
I think we take medicine, like aspirin, to trick out nerves into not feeling pain.
The nervous system was also affected because the electrode was on the skin, so I think the impulse traveled through the nerves on our skin to the muscle to make it move.
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Vocabulary
- Multicellular DEFINE
Made of many cells.
- Unicellular DEFINE
Made of one cell.
- Tissue DEFINE
Groups of specialized cells that work together.
- Xylem DEFINE
Plant tissue that brings water and dissolved nutrients up from the plant roots and helps to form the woody stem.
- Organ DEFINE
A group of different tissues that work together to perform a specific function (e.g., heart, stomach, and kidney).
- System DEFINE
Organs and tissue working together to perform a function (e.g., digestive system and nervous system).
- Brain DEFINE
The central organ of the nervous system.
- Sense Receptors DEFINE
Specialized cells that allow for the detection of sound, light, taste, touch, and smell.
- Blood Vessels DEFINE
Tube-like structures that carry blood throughout an organism.
- Villi DEFINE
Hair-like projections found in the small intestines (digestive system) that help absorb nutrients.
- Multicellular DEFINE
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Reading Material
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DIY Activity Guide
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Lesson Plan
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Teacher Guide