Figure 2-1. A "typical" animal cell.
(2) The ribosomes are granular particles concerned with protein synthesis.
They may be found free, clustered, or attached to the endoplasmic reticulum.
(3) The vacuoles are small spaces or cavities within the cytoplasm. These
serve functions at the cellular level such as digestion, respiration, excretion, and
(4) The Golgi complex is a portion of the endoplasmic reticulum that aids in
the final preparation of certain proteins and mucus-like substances and in the
movement of these substances. It is best-developed in secretory cells.
(5) The mitochondria are the "powerhouses" of the cell. They "recharge"
ADP molecules to form ATP molecules.
(6) There are ordinarily two centrioles. These organelles play a major role in