What is the function of Spongocytes?
What is the function of Spongocytes?
* Spongocytes secrete spongin, collagen-like fibers which make up the mesohyl. * Collencytes secrete collagen. * Spicules are stiffened rods or spikes made of calcium carbonate or silica which are used for structure and defense. * Cells are arranged in a gelatinous non-cellular matrix called mesohyl.
What is a major function of Amoebocytes?
The amoebocytes (derived from stem-cell-like archaeocytes), are so named because they move throughout the mesohyl in an amoeba-like fashion. They have a variety of functions: In addition to delivering nutrients from choanocytes to other cells within the sponge, they also give rise to eggs for sexual reproduction.
Where are Archaeocytes found?
sponges
What are Choanocytes?
Choanocytes (also known as “collar cells”) are cells that line the interior of asconoid, syconoid and leuconoid body types of sponges that contain a central flagellum, or cilium, surrounded by a collar of microvilli which are connected by a thin membrane.
How do sponges feed?
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. As it passes through the channels and chambers inside the sponge, bacteria and tiny particles are taken up from the water as food.
What are sponges most likely to feed on?
plankton
What helps move water through a sponge?
Since water is vital to sponges for excretion, feeding, and gas exchange, their body structure facilitates the movement of water through the sponge. Structures such as canals, chambers, and cavities enable water to move through the sponge to nearly all body cells.
How does a sponge get oxygen?
A sponge gets its oxygen from water too. The water contains oxygen, which moves from the water into the sponge’s cells in a process known as diffusion. So the oxygen moves from the water into the sponge. Diffusion also carries waste products from the sponge’s cells into the water.
What makes porifera unique?
Characteristic Features of Phylum Porifera They are generally marine aquatic organisms, with a few freshwater species. Their bodies are asymmetrical. Body shape can be cylindrical, vase-like, rounded or sac-like. They are diploblastic animals with two layers, the outer dermal layer and the inner gastral layer.
What are the characteristics of sycon?
Sycon ciliata are creamy yellow in color and delicate-looking. Their bodies are arranged in the asconoid system, which is a simple tube with no folding of the outer body wall. They range from 1-3cm in height. Hairy, needle-like spines (called spicules) cover their bodies.