The velocity of blood flow is through the capillaries than the blood flow through the aorta because the overall cross-sectional area of all capillaries is in comparison to the aorta.

Slower; larger

Explanation:

The velocity of the blood flowing in the blood capillaries is dependent on the pressure created due to the cross section of the capillaries.

The velocity of the blood flow in the capillaries is slower when compared to that of the aorta.

This is because the cross sectional area of the capillaries is larger as compared to that of aorta.

chordata is the answer

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.