tubular structures

Tubular structures are hollow, pipe-like formations found in nature and engineering, designed to channel fluids or gases efficiently. Examples include blood vessels in the body, which transport blood; plants' xylem vessels that carry water; and industrial pipelines used to move liquids or gases. Their shape provides strength and flexibility while minimizing material use, allowing for efficient flow and transport. These structures are characterized by their long, cylindrical form, which helps reduce resistance and maintain flow velocity, making them fundamental in biological systems and various engineering applications.