A whimsical cartoon showcasing a red blood cell designed like a boat sailing through a vibrant bloodstream

A colorful cartoon illustration of a red blood cell with cartoonish features, showcasing oxygen molecules (depicted as bright blue spheres) attaching to the red blood cell, and carbon dioxide molecules (depicted as darker gray spheres) being released from the red blood cell

A stylized illustration of a single white blood cell, its biconcave disk shape artistically distorted as it rolls and tumbles through a fluid, crimson-hued background that resembles a flowing river of blood vessels