What Name Is Given To The Food-Trapping Cells Of Sponges?

What Name Is Given To The Food-trapping Cells Of Sponges??


How do sponges trap their food?

Sponges feed by straining food particles from water. As water enters a sponge Page 2 it carries tiny organisms such as bacteria and protists. Collar cells on the inside of the central cavity trap these food particles and digest them. Sponges are very efficient at removing food particles from water.

What is the name of this cell found in sponges?

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.

What name is given to the food trapping cells of organisms that belong to the phylum porifera?

Choanocytes trap bacteria and other food particles from water flowing within the sponge: in through the ostia and out through the osculum particles are ingested by phagocytosis.

See also what state has the highest average elevation

What are the cells in a sponge that are primarily responsible for trapping food particles from circulating water?

What are the cells in a sponge that are primarily responsible for trapping food particles from circulating water? a gastrovascular cavity. You just studied 13 terms!

What are the 3 types of cells found in sponges?

Three principal types of cells may be distinguished—choanocytes archaeocytes and pinacocytes–collencytes.

Which cells in sponges have food reserves?

Thescocytes are the cells that store food (glycogen). These cells have bulbous or thick pseudopodia. Pinacocytes are flat cells that form the outer ectoderm or pinacoderm. Choanocytes are the collar cells that form the inner layer of the sponge body (Choanoderm).

What are Ostia?

Ostia are the inhalant pores in the body of sponges. Water enters the body of sponges through ostia and reaches the spongocoel. It then flows out of the body through osculum. Ostia is present only in sponges i.e. phylum Porifera as sponges have a porous body.

Is Porifera exoskeleton or endoskeleton?

Sponges are aquatic invertebrates that make up the phylum Porifera. Sponges are filter feeders. They pump water into their body through their pores. Sponges have an endoskeleton that gives them support and protection.Jul 3 2019

What are the classification of Porifera?

The phylum Porifera has four classes namely the Calcarea Demospongiae Hexactinellida and Homoscleromorpha.

What is canal system in Porifera?


All the cavities of the body traversed by the currents of water which nourish the sponge from the time it enters by the pores until it passes out by the osculum are collectively termed canal system.

What is the large central water filled cavity of the sponge called?


In asconoid sponges the two major cell layers surround a fluid-filled cavity called the spongocoel the large central cavity of sponges . Water is pumped directly through pores called ostia into the spongocoel and then out of the sponge through an opening called the osculum (plural oscula).

What is a Porocyte in sponge?

: one of the large tubular cells that constitute the wall of the incurrent canals in some sponges.

Which of the following phyla is entirely aquatic?

The phylum of sponges Phylum Porifera is entirely aquatic with well over 98% of all sponge species found in marine environments and a small percentage found in freshwater lakes and streams.

What is the function of Ostia in sponges?

Scattered among the pinacoderm are the ostia that allow entry of water into the body of the sponge. These pores have given the sponges their phylum name Porifera—pore-bearers. In some sponges ostia are formed by porocytes single tube-shaped cells that act as valves to regulate the flow of water into the spongocoel.

See also how to make a fishing trap

What does the name Porifera mean?

The phylum name Porifera means pore-bearing. Sponges take their name from small holes that cover their bodies.

What cell type in sponges is responsible for distributing nutrients to other cells?

Amoebocytes are responsible for distributing nutrients to other cells. They also digest and transport food as well as excrete waste.

Which cells are absent in sponges?

Nerve cells are the neurons that are involved in transmitting impulse across the brain.
  • B. Gland cells secrete an adhesive substance and provide a means of attachment for the animal.
  • C. …
  • Phylum porifera is the only phylum in animal kingdom in which nerve cells are absent. …
  • So the correct answer is ‘Nerve cell’.

Which of the following cells line a sponge?


The choanocyte (also called collar cells) line the cavity of water canal of sponges. These are ovoid cells with one end embedded in the mesophyll and the other exposed.

What is Ostia and osculum?

Ostia are the tiny pores present on the surface of sponges from where water enters and goes to the spongocoel. The osculum is the opening from where the water goes out after passing through the spongocoel.

What are Coronary Ostia?

Location: The coronary arteries originate as the right and left main coronary arteries which exit the ascending aorta just above the aortic valve (coronary ostia). … The ostia of the left and right coronary arteries are located just above the aortic valve as are the left and right sinuses of Valsalva.

In which phylum is Ostia found?


Ostia are the pores present in the body wall of poriferans (sponges). Through ostia the water moves in and out of the body of sponges.

What is the exoskeleton of sponge?

The exoskeleton of sponges (so the parts that you see) are composed of a mixture of spongin and/or spicules. Spongin is a modified type of collagen protein and forms the “fibers” or “mortar” that hold spicules together. … Spicules are composed of either Calcium or Silica.

Does a sponge have an endoskeleton?

In most sponges an internal gelatinous matrix called mesohyl functions as an endoskeleton and it is the only skeleton in soft sponges that encrust such hard surfaces as rocks. More commonly the mesohyl is stiffened by mineral spicules by spongin fibers or both.

Which type of endoskeleton is present in Porifera class calcarea?

Calcareous spicules

Option A: Calcareous spicules: They are made of calcium carbonate. They are the endoskeleton of the sponges of the class Calcarea.

See also where rivers meet the ocean

What is the identifying characters of phylum Porifera?

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 3 types of Porifera?

The three classes are: 1. Calcarea or Calcispongiae— (Calcareous Sponges) 2. Hexactinellida or Triaxonida or Hyalospongiae—(Glass Sponge) 3. Demospongiae.

Which one is the example of phylum Porifera?

Give a few examples of Poriferans.

Sycon. Spongilla. Hylonema. Cliona.

Which cells line the radial canals in porifera?

These collar cells or choanocytes form a type of cell layer called choanoderm inside the sponges. In asconoid sponges they are seen as the dotting surface of the spongocoel. They form radial canals in syconoid sponges. A radial canal is present between the two incurrent canals.

What is the simplest type of canal system in porifera?

Ascon type

The simplest type of canal system found in Sponges is Ascon type. Sycon type and leucon type of canal systems are advanced canal systems which are produced by folding in the body wall of ascon type of sponges.

Which type of canal system is found in Euplectella?


The circulation of water occurs through the canal system. The type of canal system is syconoid.

What is the canal system of sponges?

The water circulatory system of sponges also called as canal system is the characteristic feature of the phylum Porifera. Canal system is also known as aquiferous system. The canal system of sponges helps in food acquisition respiratory gas exchange and also in excretion.

What is Pinacocyte cell?

Definition of pinacocyte

: one of the flat cells covering the external surface and lining the incurrent and excurrent canals of sponges.

What is a Pinacoderm in sponge?

The pinacoderm is the outermost layer of body cells (pinacocytes) of organisms of the phylum Porifera (sponges) equivalent to the epidermis in other animals.

SPONGES | Biology Animation

WCLN – Feeding in Sponges

Unit 14 – Sponges & Cnidaria

Sponges – Time-lapse of Sponge Cells Recombining

Leave a Comment