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| Question | Answer |
| What is a tissue? | A group of cells that are specialised to work together to carry out a particular function. A tissue can contain more than one cell type |
| Outline the structure of squamous epithelium tissue | A single layer of flat cells lining a surface, a thin exchange surface for efficiency E.g. alveoli |
| Outline the structure of ciliated epithelium tissue | Layer of cells covered in cilia Found on surfaces where things need to be moved (e.g. trachea) The cilia wafts mucus along |
| Outline the structure of muscle tissue | Made up of bundles of elongated cells (muscle fibres). There are three types: Smooth (e.g. lining the stomach) Cardiac (in the heart) Skeletal (used to move) |
| Outline the structure of cartilage | A type of connective tissue found in the joints. Also shapes and supports ears, nose and trachea. Formed when chondroblasts secrete an extracellular matrix (jelly- like substance containing protein fibres), which they become trapped inside |
| Outline the structure and function of xylem tissue | STRUCTURE: Contains hollow xylem vessel cells (which are dead) and living parenchyma cells FUNCTION: Transports water around the plant and supports it |
| Outline the structure and function of phloem tissue | STRUCTURE: Arranged in tubes and made up of sieve cells, companion cells and some ordinary plant cells. Each sieve cell has end walls with holes in them, so that sap can move through them. These end walls are called sieve plates FUNCTION: Transport sugars around the plant |
| What are organs? | A group of different tissues that work together to perform a particular function |
| Outline the structure of lungs | Contain squamous epithelium tissue (alveoli) and ciliated epithelium tissue (bronchi etc.). Also have elastic connective tissue and vascular tissue (blood vessels) |
| Outline the structure of the leaf | Contains palisade tissue, epidermal tissue (prevent water loss), and xylem and phloem tissues in the veins |
| What are organ systems? | Organs work together to carry out a particular function |
| Outline the structure of the respiratory system | Lungs, trachea, larynx, nose, mouth and diaphragm All organs, tissues and cells involved in gas exchange |
| Outline the structure of the circulatory system | Heart, arteries, veins and capillaries Organs involved in blood supply |
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