What function do the spicules serve?
Besides supporting sponge cells, spicules can help larvae stay buoyant while in the plankton or reach the bottom at settlement, enhance reproduction success, or catch prey.
What are some possible functions of spicules and Spongin?
Answer: Spongin and sponge spicules are the skeletal structures of the sponge body. Like all skeletons, they support the soft tissues of the body. The sharp spicules and the softer spongin are arranged in a complex three-dimensional latticework that holds up the cells and gives the sponge its shape.
What do the spicules do for the sponge quizlet?
What do the spicules do for the sponge? Help gives sponge rigidity and form.
What two materials make up spicules?
Spicules are often categorized by size, the larger being megascleres and the smaller microscleres. Some spicules are formed of the mineralized substances calcium carbonate and silica, while others are made of an organic substance called spongin.
What are the different types of spicules?
Classification of Spicules: First, spicules are of two general kinds—megascleres and microscleres. The spicules are further classified according to the number of their axes and rays. Words designating the number of axes end in axons, those referring to the number of rays end in actine or actinal.
Are choanocytes significant to a fundamental?
Are choanocytes significant to a fundamental process for sponges? Choanocytes are fundamental to the nutrition of the sponge. Choanocytes keep water flowing through the spongocoel and obtain food, which is necessary for maintenance, growth, and reproduction.
Which is the most efficient canal system?
As the canal system becomes more complex, the number of flagellated cells increases and the force to draw water current is increased. The syconoid canal system is therefore more efficient than the asconoid type and the leuconoid type is the most efficient.
Where are spicules found?
Spicules are structural elements found in most sponges. They provide structural support and deter predators. Large spicules that are visible to the naked eye are referred to as megascleres, while smaller, microscopic ones are termed microscleres.
How do you identify spicules?
Spicules are composed of either Calcium or Silica. Looking at composition is another way to narrow down possible sponge groupings. The “brightness” of the sample under the SEM is one way to guess at content. Calcium has a higher atomic number than Silica and is a better conductor, so it appears brighter.
What advantage do Cnidocytes?
Cnidocytes are fundamental for food capture by cnidarians. They trap and slow down prey so that the cnidarian can get food for maintenance, growth, and reproduction.
Are spicules significant to a fundamental process for sponges?
In what way are spicules significant to a fundamental process for sponges? Spicules not only support cells of sponges, they also help larvae to stay buoyant while in the plankton or reach the bottom at settlement, enhance reproduction success, or catch prey.
What is the difference between an Incurrent canal and a radial canal?
The incurrent canals are non-flagellated as they are lined by pinacocytes and not choanocytes. On the other hand radial canals are flagellated as they are lined by choanocytes. These canals open into the central spongocoel by internal ostia or apopyles.
Where canal system is found?
Canal system is helpful in food gathering, respiratory exchange and removal of waste. Choanocytes line the spongocoel and the canals. Mainly, four types of canal systems are found in sponges. They are the ascon type, sycon type, leucon type and rhagon type.
Why are spicules important for sponges?
Spicules are structural elements found in most sponges. They provide structural support and deter predators. Large spiculesthat are visible to the naked eye are referred to as megascleres, while smaller, microscopic ones are termed microscleres.
What is the function of Gastrodermis?
The gastrodermis is the inner layer of cells that serves as a lining membrane of the gastrovascular cavity of Cnidarians. The term is also used for the analogous inner epithelial layer of Ctenophores. It has been shown that the gastrodermis is among the sites where early signals of heat stress are expressed in corals.
What is the advantage of a gastrovascular cavity?
What is the advantage of a gastrovascular cavity that ramifies throughout the body? Higher surface area for the distribution/absorption of nutrients.
Are Choanocytes significant to a fundamental?
What is the advantage of a partitioned Gastrovascular cavity?
What is the advantage of a partitioned gastrovascular cavity? The partitioning of the gastrovascular cavity increases its surface area for a greater rate of absorption.
What is the function of spicules in sycon?
Functions of the spicules in sycon sponge: 1) They will form a firm frame work of the body and give support to the soft body of the sycon. 2) Spicules give definite shape to the body. 3) They protect the body from disintegration by the wave action of the water.
What are the three types of spicules?
Spicule types Strongyles are megascleres with both ends blunt or rounded. Styles are megascleres with one end pointed and the other end rounded. Tornotes are megascleres with spear shaped ends. Tylotes are megascleres with knobs on both ends.
What are different types of spicules?
According to the size, spicules are classified into two major types: Megascleres, which are large-sized and constitute main supporting framework of sponge body and Microscleres, which are smaller in size and occur in the mesenchyme.
Which is function other than support might spicules serve?
give them more surface area to absorb the nutrients and oxygen as they flow in. c What function other than support might spicules serve? Spicules are structural elements in sponges that provide structural support and protection against predators.
What is the function of the spicules in a sponge?
Spicules are the skeleton of sponges and they help maintain the shape and size of the sponge. They also allow the sponges to have more surface area to capture food. Question 5 a Consider objective 1 listed at the beginning of this exercise.
What are the different types of nerves in the body?
It includes different types of nerves with their own specific functions, including: autonomic nerves – responsible for regulating automatic functions of the body, such as blood pressure and bladder function These symptoms are usually constant, but may come and go.
How are spinal nerves connected to the rest of the body?
Anatomy. The spinal nerves are peripheral nerves that transmit messages between the spinal cord and the rest of the body, including muscles, skin, and internal organs. Each spinal nerve is dedicated to certain regions of the body.
Which is the nerve closest to the front of the head?
For example, your olfactory nerve is closest to the front of your head, so it’s designated as I. Their functions are usually categorized as being either sensory or motor. Sensory nerves are involved with your senses, such as smell, hearing, and touch. Motor nerves control the movement and function of muscles or glands.
What are the functions of the 12 cranial nerves?
Disorders of the hypoglossal nerve can cause paralysis of the tongue, most often occurring on one side. The twelve cranial nerves are a group of nerves that start in the brain and provide motor and sensory functions to the head and neck.
Which is the most important nerve in the body?
The vagus nerve is the longest nerve of the autonomic nervous system and is one of the most important nerves in the body. The vagus nerve helps to regulate many critical aspects of human physiology, including the heart rate, blood pressure, sweating, digestion, and even speaking.
Where does the vagus nerve supply parasympathetic fibers?
Perhaps the greatest significance of the vagus nerve is that it is the body’s major parasympathetic nerve, supplying parasympathetic fibers to all the major organs of the head, neck, chest, and abdomen.
