Phylum Sponges (Porifera) Overview

False (B)

Spongilla lacustris

<p>Leuconoid</p> Signup and view all the answers

<p>Asconoid = Simple tube with single opening (osculum) Syconoid = Larger body with thicker walls and single osculum Leuconoid = Most complex with multiple oscula and canal systems All = Sponges are solely marine organisms</p> Signup and view all the answers

<p>They have a nervous system. (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>choanocytes</p> Signup and view all the answers

<p>asconoid</p> Signup and view all the answers

<p>Asconoid = Simple tube with pores and a single osculum Syconoid = Larger body with a thicker wall and a single osculum Leuconoid = Most complex with masses of tissues and multiple oscula Amoebocytes = Cells responsible for digestion and nutrient transport</p> Signup and view all the answers

A group of animals that are considered to be the simplest multicellular organisms. They lack true tissues and organs, and instead are organized at the cellular level.

Sponges are filter feeders, meaning they capture food particles from the water that flows through their bodies. This process occurs inside their cells, a method known as intracellular digestion.

Sponges are sessile, meaning they remain attached to a single location for their entire life. However, their larvae can move freely.

One of the main types of sponge body structures, characterized by a simple tube shape with pores and a single opening called an osculum.

A more complex sponge body type with a thicker body wall and a single osculum. It features an intricate system of canals that allow for water flow.

Sponges have two basic cell types: somatic cells, which perform various functions, and gametes, which are involved in reproduction.

Sponges are multicellular animals that lack tissues. They are organized at the cellular level, meaning their cells work independently of each other.

Sponges are filter feeders that capture food particles from water flowing through their bodies. This process occurs within their cells, called intracellular digestion.

The mesophyll is a jelly-like layer in sponges that lies between the outer epidermal cells and the inner collar cells.

Spicules are tiny, needle-like structures made of calcium carbonate or silica that provide support and protection for sponges.