Its the little tunnels that let in and release water
Sponges with a leuconoid body type are the most efficient in terms of maximizing the surface area for nutrient exchange and can grow to larger sizes compared to other body types like asconoid or syconoid. These sponges have complex canal systems that increase the efficiency of nutrient uptake and waste removal.
Spongest have the most complex body systems and they are very flowwy
No clue, but here is a hint, look in the book!
Skeleton made up of spicule supports most sponges .
Organ systems are most complex and fragile starting with the atoms. The most complex organ systems is the organism. In between are the molecules, cell, tissue, organ, and organ system.
Most sponges are marine, but there are some freshwater varieties
Saturn
organ system
nerve chord
The group of organ systems organized from most complex to least complex typically starts with the nervous system, then the circulatory system, followed by the respiratory, digestive, excretory, endocrine, and finally the integumentary system.
Sea Sponges, They Absorb The Most Water Or Any Fluid And Synthetic Sponges Don't Have As Much Absorbency, Also They Don't Have As Many Holes.
Sea sponges smell and taste bad so that they don't get eaten by most fish