WHY DO WE HAVE OVER 35 TRILLION CELLS?
What is a cell? Cell: Smallest unit of living matter that can carry out all processes required for life
Cells have 2 main categories Prokaryotic Cells NO nucleus NO membrane-bound organelles LOOSE DNA in the cytoplasm Prokaryotes are single-celled Eukaryotic Cells Nucleus Membrane-bound organelles DNA found in the nucleus Eukaryotes can be single or multi-cellular
2 Main types of Eukaryotic Cells Animal Cells Found in all animals Plant Cells Found in all plants
Organelles Organelle = little organ Structures specialized to perform distinct processes within a cell
Cytoplasm
Cytoskeleton
Nucleus
Endoplasmic Reticulum
Ribosomes
Golgi Apparatus
Mitochondria
Vacuole
Lysosome
Cell Wall – Plants only!
Chloroplast – Plants only!
Cilia
Cell Membrane/Plasma Membrane