Answer:
Explanation:
1) Excitation brings about contraction.
2) Contraction leads to an increase in blood pressure.
3) Changes in blood pressure results in the opening and closing of the heart valves.
4) The opening and closing of heart valves then regulates the flow of blood and it's volume.
"Yes, as long as your spouse wears a mask and stays at least 3 feet away from you."
Answer:
Low rainfall and available water; waxy coating on leaves to prevent drying.
Explanation: