Question

सर्कुलेटरी सिस्टम है जीवन फ्रॉम ओपन क्लोज टाइम इन एनिमल्स विच फाइलम कैन लिफ्ट फॉर द फर्स्ट टू रिप्रेजेंट लो सरकुलेशन​

Answer 1

Answer:

The heart is central to the circulatory system as it is the fist-sized pump that circulates the blood throughout the body.

As animals became more complex and multicellular, the circulatory system evolved because simple diffusion was insufficient to supply all of the cells with nutrients.

The coordination of the circulatory system and the respiratory system to ensure proper gas exchange is very important in animals that have lungs and gills.