The Chemistry of Life: Bonding, Elements, and Membranes

Water-related content appears at the start: focus on phospholipid structure and the membrane organization.
Phospholipid molecule is amphipathic: hydrophilic (water-loving) phospholipid heads and hydrophobic (water-fearing) phospholipid tails.
Phospholipid membrane forms a bilayer: hydrophilic heads face the aqueous environment (water), while hydrophobic tails tuck away inside the membrane core.
This arrangement underlies the structure and function of cell membranes in living systems.