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7 Cards in this Set
- Front
- Back
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What is a tissue? |
A tissue is a group of similar cells that are specially adapted to work together to carry out a particular function. |
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What are the four examples of tissues and where are they found? |
Squamous epithelium - single layer of cells lining a surface. Found in lots of places such as the alveoli in the lungs Ciliated epithelium - layer of cells covered in cilia. Found on surfaces where things need to be moved such as the trachea Xylem tissue - a plant tissue that transports water around the plant and supports the plant. Contains xylem vessel cells and parenchyma cells Cartilage - connective tissue found in the joints. Shapes and supports the ears, nose and windpipe |
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What is an organ? |
An organ is a group of different tissues that work together to perform a particular function. |
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A leaf is a plant organ. What is it made up of and why? |
Lower epidermis - contains stomata (holes) to let air in and out for gas exchange Spongy mesophyll - full of spaces to let gases circulate Palisade mesophyll - most photosynthesis occurs here Xylem - carries water to the leaf Phloem - carries sugar away from the leaf Upper epidermis - covered in a waterproof waxy cuticle to reduce water loss |
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The lungs are an animal organ. What are they made up of and why? |
Squamous epithelium tissue - surrounds the alveoli which is where gas exchange occurs Fibrous connective tissue - helps to force air back out of the lungs when exhaling Endothelium tissue - makes up the wall of the capillaries which surround the alveoli and line the larger blood vessels |
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What is an organ system? |
Organs work together to form organ systems, each system has a particular function |
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Give two examples of an organ system and state what it is made up of |
1) The respiratory system - made up of all organs, tissues and cells involved in breathing. The lungs, trachea, larynx, nose, mouth and diaphragm 2) The circulatory system - made up of organs involved in blood supply. The heart, arteries, veins and capillaries |
