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On what surface is the Ambulcaral groove visible on a star fish?
Echinoderms can have ambulacral parts that include ossicles, plates, spines, and suckers. For example, sea stars or "star fish" have an ambulacral groove on their oral side (underside). This ambulacral groove extends from the mouth to the end of each ray or arm. Each groove of each arm in turn has four rows of hollow tube feet that can be extended or withdrawn. Opposite the ambulacral groove is an ambulacral ridge on the aboral side of each ray.
What is an ambulacral?
An ambulacral is another word for an ambulacrum, a row of pores of an echinoderm for the protrusion of appendages such as tube feet.
What is the function of the ambulacral groove?
The function of the ambulacral groove on a starfish is to open the shells of bivalves. It also hold the tubed feet of the starfish.
What bony plates make up starfish skeleton?
It is the ossicles :)
What is fusion of the ossicles?
Fusion or fixation of the ossicles is where one or more of the three auditory ossicles cannot transmit sound vibrations for a variety of reasons. This does cause "conduction" deafness or hearing loss.
What is the main function of the ambulacral system in ehinoderm?
The main function of the ambulacral system in echinoderms is to facilitate movement, respiration, and feeding. It consists of a series of fluid-filled tube feet that help echinoderms to crawl, capture food, and exchange gases with the surrounding environment.
Do echinoderms have ossicles?
YES, but it is not the same "ossicles" that are found in the mammal ear. Echinoderm ossicles are small calcium-matrix plates that make up the dermis or endoskeleton of the echinoderm. They provide protection and support to the underlying tissue.
What calcium - rich formation builds the internal skeleton of echinoderms?
Ossicles
Is a trench that runs along the ventral surface of the starfish's arms and holds the tube feet?
The Ambulacral Groove
How is hearing loss related to the ossicles?
If there is a change to the basic structure or functioning ability of your auditory ossicles, this would result in Conductive Deafness as the ossicles will not be able to transmit and amplify the sound vibrations from the tympanic membrane to the oval window.
Does the sea cucumber have only a few ossicles?
The word "ossicle" means "little bone" The sea cucumber has calcified structures just under the skin which are called microscopic ossicles or sclerietes. There are many of these ossicles which are remnants of a previous endoskeleton.
Skeletal plates in starfish?
They make up the skeleton and protect internal structures.
