What is the smallest blood vessel in the human body?
Hint: These tiny blood vessels are where oxygen and nutrients are exchanged with tissues.
Capillaries are the smallest blood vessels in the human body.
Capillaries are the smallest blood vessels in the human body, playing a crucial role in the circulatory system by facilitating the exchange of oxygen, nutrients, and waste between blood and tissues.
These microscopic vessels connect arteries to veins and have thin walls, allowing for efficient diffusion of gases and nutrients at the cellular level.
Unlike larger blood vessels, capillaries form vast networks that reach nearly every cell in the body, ensuring proper oxygenation and waste removal. Their small size and permeability make them essential for maintaining homeostasis and supporting vital physiological functions.
