Final answer:
The velocity of blood flow actually decreases as blood flows into capillaries due to their smaller cross-sectional area.
Step-by-step explanation:
The incorrect statement about capillaries is d. The velocity of blood flow increases as blood flows into capillaries.
Capillaries have a smaller cross-sectional area compared to arterioles and arteries, which results in a decrease in blood velocity. This slow flow allows for efficient exchange of substances between the blood and surrounding tissues.
Additionally, capillaries have a large total cross-sectional area, which contributes to their function in facilitating the exchange of nutrients, waste, and oxygen at the cellular level.