Sponges are multicellular organisms consisting of jelly-like mesohyl sandwiched between two thin layers of cells, and usually have tube-like bodies full of pores and channels that allow water to …

Dec 7, 2025 · Sponges are unusual animals in that they lack definite organs to carry out their various functions. The most important structure is the system of canals and chambers, called a …

Dec 11, 2025 · What are sponges. Where & how long do they live. What & how do they eat. How do they reproduce. Learn characteristics like symmetry, reproduction, & life cycle with images.

Simple vase-like sponges have a single large top opening, called the osculum through which water leaves the sponge. Most compound sponges have many oscula all over the body of the …

Learn about the structural components of a sponge with a detailed diagram. Explore the functions of key parts like ostia, osculum, spongocoel, and choanocytes.

Dec 11, 2015 · Sponges have a number of specialized cells that carry out distinct functions within the organism, but they do not have true tissues or organs. There are three different body plans …

The gel-like consistency of mesohyl acts as an endoskeleton, maintaining the tubular morphology of sponges. In addition to the osculum, sponges have multiple pores called ostia on their …

Aug 3, 2025 · A sponge’s basic body plan involves an outer layer called the pinacoderm, which provides protection and helps maintain the sponge’s shape. Water is drawn into the sponge …

Sponges have numerous tiny pores called ostia on their outer surface. These pores lead into a system of channels and chambers that make up the sponge's body. Water enters the sponge …

Dec 7, 2025 · The members of one family, the Spongillidae, are found in fresh water; however, 98 percent of all sponge species are marine. Adult sponges lack a definite nervous system and …