Lysosomes can help break down food vesicles or can be used to recycle the cell's contents. Mitochondria are double-membraned. The inner membrane is highly folded for more surface area for energy-producing reactions. 3 Cytoskeleton , or lattice-like network of filaments throughout the cell for support. 3,5 Centrioles .
Centrioles are microtubule structures that assist in cell division in animal cells.
Flagella and cilia . Both are membrane-bound cylinders that contain sets of microtubules, and move as a result of microtubule doublets sliding along each other. In particular, older rbcs are removed by the spleen and other sites with phagocytic cells. As seen in Fig.