True or False: Decreasing the viscosity of blood leads to an increase in venous return.

Decreasing the viscosity of blood does indeed lead to an increase in venous return. Viscosity refers to the thickness or resistance to flow of liquid; in the case of blood, a lower viscosity means that it flows more easily through the blood vessels.

When blood is less viscous, it can move more freely, reducing the effort required for the heart to pump it back towards itself from the peripheral areas of the body. This improved flow can enhance venous return, which is influenced by several factors, including the pressure gradients in the venous system and the overall volume of blood returning to the heart.

Consequently, when the blood's viscosity decreases, the heart can receive a greater volume of blood more efficiently, thereby supporting increased venous return. This principle is especially critical in scenarios such as during surgical procedures or in patients with conditions affecting blood properties, where optimizing blood flow is essential for maintaining adequate circulation and perfusion.