AQA Biolog- levels of organisation
- Created by: lucyneedstorevise
- Created on: 27-04-19 23:57
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- levels of organisation
- specialised cells
- cells are basic building blocks of all living organisms.
- cells differentiate to form different types of cells.
- most types of animal differentiated at an early stage but many types of plants cells differentiate whenever.
- signs of cell differentiating:
- changing shape
- sub-cellular structures to develop to let it carry out a certain function.
- in plants:
- xylem
- phloem
- root hair cells
- tissues, organs and systems
- cells are organised into tissues
- tissues are group of cells with similar structure and function which work together to do a job.
- what tissues do:
- muscle tissue contracts to produce movement
- glandular tissue produces substances substances such as enzymes and hormones
- epithelial tissue covers organs
- organs are groups of different tissues which all work together to perform a specific job.
- organs are organised into organ systems which are groups of organs working together.
- cells are organised into tissues
- specialised cells
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