NEET BIOLOGY

Detailed explanation-1: -In order obtain food, sponges pass water through their bodies in a process known as filter-feeding. Water is drawn into the sponge through tiny holes called incurrent pores.

Detailed explanation-2: -These pores are sometimes also referred to as ostia, and they provide openings for water, which carries planktonic food and oxygen, to enter the sponge body (Fig. 3.19). Simple vase-like sponges have a single large top opening, called the osculum through which water leaves the sponge.

Detailed explanation-3: -The Porifera are primarily filter feeders, utilizing food particles suspended in the water and captured by the choanocytes. Food particles consist essentially of bacteria, other microorganisms, and particles of organic debris; sponges also probably absorb dissolved organic substances.

Detailed explanation-4: -Instead of having a mouth, sponges bodies feature tiny pores called Ostia through which water is sucked. Cells in the sponge walls then filter the food that is present in the water as it is pumped out of the body through the osculum.

Detailed explanation-5: -Sponges have a unique feeding system among animals. Instead of a mouths they have tiny pores (ostia) in their outer walls through which water is drawn. Cells in the sponge walls filter food from the water as the water is pumped through the body and the osculum ("little mouth").