Their outsides contain the multi-purpose archeocytes, also known as amoebocytes, and in many of these organisms, flagella-bearing cells known as choanocytes maintain an internal water flow, which is used for feeding and respiration before being expelled through a hole called the osculum.
Sclerocytes form the skeletal structure of these organisms by making spicules. Their outsides contain the multi-purpose archeocytes, also known as amoebocytes, and in many of these organisms, flagella-bearing cells known as choanocytes maintain an internal water flow, which is used for feeding and respiration before being expelled through a hole called the osculum. The most primitive member of the Animal kingdom, for 10 points, name this phylum consisting mainly of sea sponges.
Sclerocytes form the skeletal structure of these organisms by making spicules.
{Porifera} [accept {sponges} until “name {this phylum}” is read]