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All the activities of their body of the sponges depend on the current of water entering through ostia and passing out through osculum or oscula. Inside the body, water current flows through system of spaces which collectively constitute the canal system. The entire physiological activities of the animal depend on the water current and the exchanges between the body and the exterior arc maintained through the water current. The food and oxygen are brought through this current while excreta and reproductive bodies are excluded through this current. The perforations of the body of the sponge by a large number of ostia is characteristic of phylum Porifera.
All the living tissues of the sponges are soft and it is a direct need of the animal to maintain a constant shape with different canals or passage-ways. Therefore, deeper layers of the body are provided with supporting spicules. Around the osculum, spicules are long and straight, while spicules situated around ostia are short and straight; around spongocoel they are T-shaped, while triradiate in the body-wall.
Thus, all the cavities of sponges with intricate passages of canals, traversed by currents of water entering by pores and passing out by osculum are collectively termed as a canal system of sponges.
A typical canal system is composed by following components :
(a) Incurrent canal - It opens externally to the outside by a small pore known as incurrent pore or ostium, but internally it ends blindly.
(b) Radial canal or excurrent canal- It is closed externally but opens internally by minute pores or apopyles into a central cavity or cloacal cavity or gastral cavity or spongocoel, which cannot be compared in any way with the stomach or intestine of other animals.
(c) Prosopyle- It is a smaller canal or passage-way connecting incurrent canal with radial canal.
The incurrent canals are lined by flat squamous cells and their functions are only to form water conduits and to form a smooth and firm surface.
The radial canals are lined by collar cells opening at the surface and are provided with flagella or whips. The lashing movements of flagellum procure the food particles and push them into the cell-mouth. Thus, this is food-capturing arrangement of sponges.
Spongocoel or cavity is lined by a thin gastric epithelium. It opens to the outside by an aperture, called osculum.
The arrangement, and complexity of the canal system varies considerably in different sponges and has been divided into four types :
1. Ascon type
2. Sycon type
3. Rhagon type
4. Leucon type
The canal system of Sycon is a network of interconnected channels that run through the body of the sponge. These canals help in the circulation of water, bringing in food and oxygen while removing waste products. The system also aids in the distribution of nutrients to individual cells within the sponge's body.
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Is sycon is fresh water sponge?
Yes, sycon is a type of freshwater sponge commonly found in freshwater habitats such as lakes, rivers, and ponds. They are filter feeders that play a crucial role in maintaining the ecosystem by filtering and removing small particles from the water.
Describe how an osteoctyle located near a central canal can pass nutrients to osteocytes located far from the central canal?
The osteocyte near the central canal receives nutrients from blood vessels in the central canal. It can then pass these nutrients through gap junctions to neighboring osteocytes, which in turn pass them on to osteocytes located further away from the central canal. This process allows for the distribution of nutrients throughout the bone tissue.
What organ system acts upon substance contained in the alimentary canal?
The digestive system acts upon substances contained in the alimentary canal. This system includes organs such as the mouth, esophagus, stomach, small intestine, and large intestine, which work together to digest and absorb nutrients from food.
The canal that runs through the core of each osteon (Haversian system) contains?
Blood vessels and nerves that supply nutrients to the bone cells within the osteon (Haversian system).
Are osteon and haversian system synonymous?
Yes, osteon and Haversian system are synonymous terms. The Haversian system is a structural unit of compact bone tissue, and it consists of concentric rings of bone matrix called lamellae surrounding a central canal known as the Haversian canal. Each Haversian system is also referred to as an osteon.
What type of sponge canal system allows the best flagellated cells to volume ratio?
The leucon type can feed the most cells, then the sycon type, then the simplest ascon type. ^^
What is the scientific name of sycon?
The scientific name of sycon is Sycon sp. because it belongs to the genus Sycon, which encompasses various species of marine sponge.
What is the grantia canal system?
The Grantia Canal System is a network of waterways that provide irrigation for agricultural purposes in the Grantia region. It helps to distribute water from a water source to different farmlands efficiently, ensuring a sustainable supply for farming activities. The system consists of canals, ditches, and reservoirs designed to optimize water distribution and utilization in the region.
Describe an Egyption irrigation system?
A ditch or canal that that brings water from the Nile to water crops.
What do sycon eat?
Sycon sponges are filter feeders that sift microscopic particles of food from the water that passes through them.
What canal system does phoenix use?
The Hohokam Canal System.
What is the system of the canal?
Alimentary Canal
What is a syconoid?
A syconoid is pertaining to or resembling a sycon.
Types of Porifera?
Spongilla, sycon, euplectelea.
The modern city of Phoenix used the canal system of the?
The Hohokam Canal System
The organs of the digestive system are called the what canal?
Alimentary Canal
What is the canal of the digestive system?
The alimentary canal or the gastrointestinal (GI) tract.
