Tissues
Tissue - A Group of Cells specialised to Work Together to carry out a Particular Function. A tissue can contain more than one cell type.
Examples:
Tissue Type
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Explanation
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Squamous Epithelium
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Single Layer of Flat Cells lining a surface. It's found in many places, including the Alveoli and the Lungs
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Ciliated Epithelium
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A layer of cells covered in Cilia. It's found in places where things need to be i.e. the trachea, to Waft Mucus.
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Muscle Tissue
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Bundles of Elongated cells (Muscle Fibres). There are 3 different types: Smooth, Cardiac, and Skeletal. They're all Slightly Different in structure.
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Cartilage
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A type of Connective Tissue found in the joints. It also Shapes and Supports the Nose and Windpipe. It is found where cells (chondroblasts) Secrete a Jelly-like substance containing Protein Fibres which become trapped inside.
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Xylem Tissue
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Two jobs - Transports Water, and Supports the plant. It contains hollow xylem vessel cells (dead) and parenchyma cells (living)
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Phloem Tissue
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Transports Sugars around the plant. It's Arranged in Tubes and is made up of Sieve Cells, Companion Cells and Regular Plant Cells.
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Organs and Organ Systems
Organ - a Group of Different Tissues that Work Together to perform a Particular Function.
LUNGS - Contain squamous epithelial tissue (alveoli), Ciliated epithelial tissue (bronchi), and elastic connective tissue and vascular tissue (blood vessels).
LEAVES - Contain palisade tissue for photosynthesis, epidermal tissue to prevent water loss from the leaf, and xylem and phloem tissues in the veins.
Each system has a particular function. The respiratory system is made up of the lungs, trachea, larynx, nose, mouth and diaphragm.
The circulatory system consists of the heart, arteries, veins and capillaries.
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