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Questions and Answers
What is the smallest and most fundamental unit of matter?
What is the smallest and most fundamental unit of matter?
What is the process by which smaller units combine to form larger molecules?
What is the process by which smaller units combine to form larger molecules?
What is an example of a macromolecule?
What is an example of a macromolecule?
What is the function of epithelial tissue?
What is the function of epithelial tissue?
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What type of tissue provides structure and support to the body?
What type of tissue provides structure and support to the body?
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What is the function of muscle tissue?
What is the function of muscle tissue?
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What is an example of a liquid connective tissue?
What is an example of a liquid connective tissue?
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How many main types of tissue do humans have?
How many main types of tissue do humans have?
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What is the primary function of nerve tissue?
What is the primary function of nerve tissue?
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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 a group of organs that work together to perform a specific function?
What is the term for a group of organs that work together to perform a specific function?
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Why do nerve cells need to be connected to other nerve cells?
Why do nerve cells need to be connected to other nerve cells?
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What is the purpose of the different levels of organisation in the body?
What is the purpose of the different levels of organisation in the body?
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What is an example of an organ system that includes the stomach, mouth, oesophagus, small intestines, and large intestines?
What is an example of an organ system that includes the stomach, mouth, oesophagus, small intestines, and large intestines?
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Study Notes
Atomic Structure and Biological Molecules
- Atoms are the smallest and most fundamental units of matter that make up all matter, including biological molecules.
- Biological molecules, such as lipids and proteins, form organelles and cell membranes, which make up cells.
- Macromolecules, such as deoxyribonucleic acid (DNA), contain instructions for the structure and function of all living things.
Levels of Organisation
- Cells combine to form tissues, which combine to form organs, and organs combine to form organ systems.
- This hierarchical organisation enables the body to function properly.
Tissue Types
- There are four main types of tissue: muscle, nerve, epithelial, and connective.
- Connective tissue provides structure and support to the body, and includes fat, bone, cartilage, ligaments, tendons, and blood.
- Bone is a type of dense connective tissue that supports and holds up the body.
- Blood is a liquid connective tissue that supplies oxygen to the body.
Epithelial Tissue
- Epithelial tissue covers and protects the body, and is made up of continuous sheets of cells that cover the surface of the body or line body cavities.
Muscle Tissue
- Muscle tissue enables movement through the contraction and relaxation of muscle cells.
- Multiple muscle cells must contract together to produce movement.
Nerve Tissue
- Nerve tissue enables control and communication through the transmission of electrical signals.
- Nerve cells must communicate with each other to function properly.
Organs and Organ Systems
- Organs contain multiple types of tissues working together to perform a specific function.
- Examples of organs include the heart, which contains cardiac muscle tissue, nerve tissue, and connective tissue.
- Organ systems consist of functionally related organs, such as the digestive system, which includes the stomach, mouth, oesophagus, small intestines, and large intestines.
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