The sponges are multicellular animals but they do not form tissues. They have aggregated cells body plan. Thus, they do not have organs, such as the mouth. Sponges are the members of Porifera which means they are pore-bearing animals. Their body is covered with tiny pores (ostia) which lead to a canals system. Within the canals, chambers are lined with special cells called collar cells (choanocytes). The collar cells have sticky collars which engulf tiny bits of food that brought with the water. Digestion takes place within the cells by enzymes secreted from lysosomes.
Absorption is a process that takes place in the small intestines or ileum of the GI tract, in which simple and soluble nutrients are absorbed into the blood stream.
Absorption is enhanced by several adaptations of the gut such as large surface area of the gut which directly facilitates absorption of nutrients.
Presence of villi and microvilli in the gut increases the surface area for absorption of nutrients in the ileum.
A locations air temperature is affected by it's distance from the equator. The closer the location is to the equator, then the more energy that it will receive from the big beautiful, and hot sun.
