Answer:
b) from a region of high pressure to a region of low pressure
Explanation:
Blood flow is measured in blood volume per unit time. It is the movement of blood through an organ, tissue or vessel. It is initiated when ventricles in heart contract leading to its ejection at high pressure. Major arteries receive this blood and they further transport it at high pressure to smaller arteries, arterioles and capillaries. Hence arteries have thick walls to withstand this pressure. The pressure decreases when blood reaches to veins hence their walls are not that thick. Hence, blood flows from a region of high pressure to a region of low pressure.
Answer:
Work can be defined as transfer of energy. In physics we say that work is done on an object when you transfer energy to that object. If one object transfers (gives) energy to a second object, then the first object does work on the second object.
Explanation:
The rough uneven surface gets scattered;)
Answer:
Waxy scales and needle-like leaves are characteristic that help conifers survive when the weather is dry
Explanation:
Among the adaptations to arid conditions is needle-shaped leaves that have thick cuticles. The needle shape makes the surface area relatively small determining less evaporation. The cuticle of the leaves prevents the loss of water.
Resins or waxy prevent water loss.