The major superficial and deep veins draining blood from the foot, leg, thigh, and pelvis toward the heart.

The structural and decorative components of a classical Greek temple facade and the Doric order.

Key structural components and functional regions of the rough and smooth endoplasmic reticulum and their connection to the cell nucleus.

The standard glassware and components of a simple laboratory distillation setup.

Standard parts of a laboratory Bunsen burner and the distinct temperature zones of its flame.

The distinct regions and set intersections of a standard three-set Venn diagram.

Six common mechanical gear types and transmission arrangements.

Provinces of the Netherlands.

States of Venezuela.

Macroregions of South Korea.