explain the evaluation of circulation system from lower organisms to higher organisms with suitable examples
Answers
Answer:
Open Circulatory System
The open circulatory system is the simpler of the two systems. This system is common among arthropods. The heart pumps blood - or as it is commonly known for open circulatory systems, hemolymph - into an open cavity called a hemocoel. The hemolymph mixes with interstitial fluid and sloshes around the hemocoel, bathing the internal organs and delivering nutrients and in some cases, gases such as oxygen. In some animals, the heart is simply an aorta or other blood vessel, and the hemolymph is pulsed throughout the body by muscle contractions.
There are no arteries or major veins to pump the hemolymph, so blood pressure is very low. Organisms with an open circulatory system typically have a relatively high volume of hemolymph and low blood pressure. Examples of animals with open circulatory systems include insects, spiders, prawns and most mollusks.
Hope it will help you dear