The Grantia Canal System is called the "Sycon (syconoid) Canal System." This means that the canals from the sponges inside (excurrent canals) and those from the outside (incurrent canals) of its body wall end blindly, but are connected at right angles by openings called prosopyles. This type of canal system is intermediate in canal complexity. The canals are the pathways the water takes through the sponge.
A canal toe drain is a drainage system located at the base (toe) of a canal to collect and divert excess water away from the canal, preventing waterlogging and erosion of the canal banks. These drains help to manage water levels and protect the structural integrity of the canal.
Spicules, which are structural elements found in sponges, can vary in the number of prongs depending on their type; they typically have 1 to 4 prongs. Grantia, a genus of sponge, commonly features spicules with three prongs. These structures contribute to the support and shape of the sponge, playing a crucial role in its overall anatomy.
The alimentary canal and the accessory organs
Compact bone consists of a repeating structure called a Haversian system, or osteon, which is the primary anatomical and functional unit. Each osteon has concentric layers which are deposited around a central canal, also known as the Haversian canal, each containing a blood and nerve supply.
The master apical file is the largest-sized file used during root canal treatment to shape the apical part of the canal. It helps in creating a smooth taper in the root canal preparation to facilitate proper cleaning and disinfection of the root canal system.
Grantia compressa was created in 1780.
Porifera. http://en.wikipedia.org/wiki/Grantia
It's asymmetrical.
The Hohokam Canal System.
Alimentary Canal
upright
The Hohokam Canal System
Grantia are a type of simple sponge-like animals that belong to the phylum Porifera. They lack true tissues and organs, and their bodies are organized into simple layers of cells surrounding a central cavity. One distinctive feature of grantia is their filter-feeding mechanism, where they draw in water through pores in their bodies to obtain food.
they curl up
Alimentary Canal
Spicules of Grantia typically have four prongs. These prongs help provide structural support to the sponge's body and also aid in capturing food particles from the water.
Grantia belong to the class Calcarea, a class of marine sponges characterized by their calcareous (calcium carbonate) spicules. They are filter feeders that are commonly found in shallow coastal waters.