D) genes and environment is the answer
Answer: Option D) there are no holes for blood to enter or leave the system
The human cardiovascular system is considered closed because there are no holes for blood to enter or leave the system
Explanation:
The closed circulatory system are made up of blood vessels called arteries from the heart that branch into small units called capillaries but eventually join up with other blood vessels called veins that are connected to the heart. So, blood is always confined to circulate within the blood vessels and the heart as there are no holes for blood to enter or leave the system
Thus, the human cardiovascular system is considered closed
Hypoglycemia - this is the deficiency also referred to as the lack of storage of Glucose in blood
Option B- The iterative design process must be followed step by step.
This is true about the designing solutions in science.
The scientific design process is a series of steps that are followed while trying to solve a problem and design a solution for something. It is a methodical approach to problem solving.
