Organisation of the organism
Cell structure
- Plant cells onlyCell wallChloroplastsLarge vacuole
- Plant and animal cellsNucleusCell membraneMitochondriaRibosomes
- Bacterial cellCircular DNAPlasmidsCell wall
- Specialised animal cellsCiliated cell: moves mucusNeurone: conducts impulsesRed blood cell: oxygenGametes: reproduction
- Specialised plant cellsRoot hair: absorptionPalisade: photosynthesis
- New cells from divisionExisting cells divide
- Levels: cell to organismTissueOrganOrgan systemOrganism
Size of specimens
- Magnification = image ÷ actualNo units
- Measure in mmUse a ruler
- Actual size = image ÷ magnification
- 1 mm = 1000 µmSupplementmm to µm: × 1000µm to mm: ÷ 1000