Composed of RNA and protein. Actual sites of protein synthesis. Synthesize proteins for: 1. use in the cell (free ribosomes) 2. secretion, incorporation into plasma membrane, or lysosomes (fixed ribosomes)
Composed of microfilaments, intermediate filaments and microtubules. Provides structural support; facilitates cytoplasmic streaming, organelle and cellular motility, transport of materials, and chromosomal movement in cell division.
Organize microtubules during cell division for movement of the chromosomes
Move fluid, mucus and materials over the cell surface
Propels sperm cells in human male
Increase membrane surface area for increased absorption and/or secretion