Amphipathic molecules are compounds that possess both hydrophilic (water-attracting) and hydrophobic (water-repelling) properties. This unique structure allows them to interact with both water and lipids, making them essential in biological systems. A common example of an amphipathic molecule is a phospholipid, which forms the basis of cell membranes. In aqueous environments, amphipathic molecules can arrange themselves into structures like micelles or lipid bilayers. The hydrophilic heads face outward toward the water, while the hydrophobic tails point inward, away from the water. This arrangement is crucial for maintaining the integrity and functionality of cellular membranes.