The blue color of superficial blood vessels results from

A) a lack of melanin in the area.
B) the light-scattering properties of collagen.
C) the superficial location of skin pigments.
D) an increase in arterial blood circulating in the area.
E) a lack of oxygen in the blood.

Collagen

The main structural protein found in skin and other connective tissues, known for its strength and elasticity.

Melanin

A pigment produced by melanocytes in the skin, hair, and eyes, responsible for coloration and protection against ultraviolet (UV) light damage.

Oxygen

A chemical element (O) essential for most forms of life on Earth, vital for cellular respiration in organisms.