Veins are blood vessels that carry blood toward the heart. source
Veins are blood vessels that carry blood toward the heart.
Most veins carry deoxygenated blood from the tissues back to the heart. source
Most veins carry deoxygenated blood from the tissues back to the heart.
Exceptions are the pulmonary and umbilical veins, both of which carry oxygenated blood to the heart. source
Exceptions are the pulmonary and umbilical veins, both of which carry oxygenated blood to the heart.
In contrast to veins, arteries carry blood away from the heart. source
In contrast to veins, arteries carry blood away from the heart.
Veins are less muscular than arteries and are often closer to the skin. source
Veins are less muscular than arteries and are often closer to the skin.
There are valves in most veins to prevent backflow. source
There are valves in most veins to prevent backflow.
Superficial veins are those closer to the surface of the body, and have no corresponding arteries. source
Superficial veins are those closer to the surface of the body, and have no corresponding arteries.
Deep veins are deeper in the body and have corresponding arteries. source
Deep veins are deeper in the body and have corresponding arteries.
Perforator veins drain from the superficial to the deep veins, these are usually referred to in the lower limbs and feet. source
Perforator veins drain from the superficial to the deep veins, these are usually referred to in the lower limbs and feet.
Communicating veins are veins that directly connect superficial veins to deep veins. source
Communicating veins are veins that directly connect superficial veins to deep veins.
Pulmonary veins are a set of veins that deliver oxygenated blood from the lungs to the heart. source
Pulmonary veins are a set of veins that deliver oxygenated blood from the lungs to the heart.
Systemic veins drain the tissues of the body and deliver deoxygenated blood to the heart. source
Systemic veins drain the tissues of the body and deliver deoxygenated blood to the heart.
Veins are also called "capacitance vessels" because most of the blood volume (60%) is contained within veins source
Veins are also called "capacitance vessels" because most of the blood volume (60%) is contained within veins
Thrombophlebitis is an inflammatory condition of the veins related to blood clots. source
Thrombophlebitis is an inflammatory condition of the veins related to blood clots.
The Batson Venous plexus, or simply Batson's Plexus, runs through the inner vertebral column connecting the thoracic and pelvic veins. source
The Batson Venous plexus, or simply Batson's Plexus, runs through the inner vertebral column connecting the thoracic and pelvic veins.
The valves in veins were described by Jacques Dubois, but their true function was later discovered by William Harvey. source
The valves in veins were described by Jacques Dubois, but their true function was later discovered by William Harvey.
