All creatures have circulatory systems
The circulatory system, like the water system, continually reuses the same materials.
Very much like our circulatory systems work, or any other mammal for that matter.
Poriferans do not have distinct circulatory system. Instead water flow system support all these functions like circulatory, respiratory, excretory etc.
The Circulatory system is a busy system because it can never stop. Your circulatory system is what pumps your blood and gives your cells food water and oxygen and takes waste away from your cells. If your circulatory system ever stopped then you would die.
Polar bears have a closed circulatory system(like humans) this means thier blood flows through veins and ateries to diliver oxygen around the body
circulatory system act like a water pipe, it allows blood to transport to the body
The human circulatory system moves blood through the body similar to the hydraulic system which moves liquid water.
drink water
Nutrient
closed circulatory system (double circulatory system)
the water
They're both the circulatory system.