living matter, n.All

Living matter (n.) is ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠not passive filler between the organs; blood and lymph are the background that turns a collection of organs into an organism.