Table of Contents
What is a Aboral in anatomy?
aboral – opposite to or away from the mouth; “the aboral surface of a starfish” anatomy, general anatomy – the branch of morphology that deals with the structure of animals.
What does Aboral mean in zoology?
aboral. / (æbˈɔːrəl) / adjective. zoology away from or opposite the mouth.
What is Aboral and oral?
The main axis is heteropolar—i.e., with unlike ends, one of which bears the mouth and is termed the oral, or anterior, end, and the other of which, called the aboral, or posterior, end, forms the rear end of the animal and may bear the anus. The main axis is hence termed the oral-aboral, or anteroposterior, axis.
What does Aboral surface mean?
In biology, aboral surfaces are surfaces away from or opposite the mouth. The term is a compound of the Latin preposition ā, a, abs, meaning from or away from and the noun ōs, ōris n., meaning mouth. It is also the opposite of oral which is the end containing the mouth of a radially symmetrical animal.
What is Aboral direction?
ab·o·rad. , aboral (ab-ō’rad, -răl), In a direction away from the mouth; opposite of orad.
What is the oral and Aboral sides of the starfish?
Sea stars have two surfaces: the oral and the aboral. The oral is the side with the sea star’s mouth and most people would think of it as the “bottom.” The aboral is the opposite side, and this is where the madreporite lies. The madreporite is the opening to the water vascular system.
How do you tell the difference between the Aboral and oral surfaces?
The body is divided into a central disk from which radiate five arms. The principal body axis, and the axis of symmetry, is the short oral-aboral axis, which passes vertically through the center of the disk. The animal’s pale lower side is the oral surface and the dark upper side is the aboral surface.
What is the Aboral end?
The end of an animal’s body opposite its mouth.
What is the opposite of Aboral?
Opposite of away from the oral opening or mouth (compare with ventral) orad.
Where is the Aboral on a starfish?
The top side of the sea star is called the aboral side, because it’s opposite the oral side. The bumpy-skinned aboral side is covered with loads of tiny pinchers called pedicellariae that help clean the rough surface.
What is the difference between the Aboral and oral surface of a sea star?
The oral surface, with ambulacral regions and tube feet, covers most of the sphere. The aboral surface is only a small disc at the top. In most sea urchins, spines also extend from the oral surface, usually between the rows of tube feet.
How would you distinguish the oral and Aboral sides of a sea star?
Explanation: Sea stars have two surfaces: the oral and the aboral. The oral is the side with the sea star’s mouth and most people would think of it as the “bottom.” The aboral is the opposite side, and this is where the madreporite lies. The madreporite is the opening to the water vascular system.
What is an oral surface?
lingual surface the surface of a tooth that faces inward toward the tongue and oral cavity, opposite the vestibular surface; called also oral surface.