Cells, Tissues and Organs

Cells, Tissues and Organs

Cells, Tissues and Organs

Cells are the basic unit of all living things. The different parts of cells include:

  • Protoplasm - consists of cytoplasm and nucleus
  • Cytoplasm - jelly like substance where chemical reactions take place and other parts are embedded
  • Nucleus - controls reproduction and also contains the characteristics of the cell
  • Cell membrane - surrounds the cell and controls what moves in and out of the cell
  • Mitochondria - found only in plant cells where respiration occurs
  • Chloroplasts - make plants green. Contain chlorophyll which is needed for photosynthesis
  • Cell wall - gives the cell its shape. The cell "skeleton"
  • Vacuoles - where the cell sap is stored

Plant cell

  • Chlorophyll in chloroplasts
  • Cellulose cell wall
  • Large vacuoles

Animal cell

  • No Chlorophyll or chloroplasts
  • No Cellulose cell wall
  • Small or no vacuoles

Tissues

  • Made up of lots of cells of the same type. e.g. muscle tissue is made up of many muscle cells

Organs

  • Different tissues working together to carry out a certain function. An organ can contain different types of tissue e.g. the heart
Life processes and cell activity

Cell division

Cell division

Life processes and cell activity

Diffusion and Osmosis

Diffusion and Osmosis

Life processes and cell activity

Life processes

Life processes

Life processes and cell activity

Specialised Cells

Specialised Cells