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Questions and Answers
What is the main characteristic of unicellular organisms?
What is the main characteristic of unicellular organisms?
What is the main function of nerve tissue in the heart?
What is the main function of nerve tissue in the heart?
What is the term for a collection of cells that perform the same function?
What is the term for a collection of cells that perform the same function?
What is the highest level of organisation in the human body?
What is the highest level of organisation in the human body?
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What is the function of the digestive system?
What is the function of the digestive system?
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What is the term for a structure that contains more than one type of tissue working together?
What is the term for a structure that contains more than one type of tissue working together?
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What is the term for the level of organisation that consists of multiple cells?
What is the term for the level of organisation that consists of multiple cells?
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What is the term for the level of organisation that consists of functionally related organs?
What is the term for the level of organisation that consists of functionally related organs?
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Study Notes
Unicellular and Multicellular Organisms
- Unicellular organisms consist of one cell only, examples include Amoeba and Paramecium.
- Multicellular organisms consist of multiple cells, examples include humans, animals, and plants.
Cellular Organisation in Multicellular Organisms
- In multicellular organisms, cells need to communicate with each other to coordinate and control bodily functions.
- Cells combine to form more complex, higher-order structures.
Levels of Organisation
- The human body has multiple levels of organisation: cells, tissues, organs, and organ systems.
- This organisation allows for digestion, movement, nutrient transport, and waste excretion.
Tissues
- A tissue is a collection of cells that perform the same function.
- Examples of tissues include muscle tissue (formed by muscle cells) and nerve tissue.
- Humans have four main types of tissues: muscle, nerve, connective, and epithelial tissue.
Organs
- An organ is a structure that contains more than one type of tissue working together.
- Examples of organs include the heart, which contains cardiac muscle tissue, nerve tissue, and connective tissue.
Organ Systems
- An organ system is a group of functionally related organs.
- Examples of organ systems include the digestive system, which consists of the stomach, mouth, oesophagus, small intestines, and large intestines.
- The digestive system's function is to digest food and release nutrients.
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Description
Learn about the differences between unicellular and multicellular organisms, including examples and characteristics of each. Discover how cells communicate and coordinate in the human body.
