to move
The function of the retractor muscle in bulls is to form a sigmoid flexure (s-shaped curve) in the penis in order to hold it inside the sheath when not erect.
The retractor muscle in bulls primarily functions to retract the penis into the sheath after mating or during periods of non-arousal. This muscle helps maintain the proper position of the penis, ensuring protection when not in use. Additionally, it plays a role in facilitating the reproductive process by aiding in the extension and retraction of the penis during copulation.
The mantle retractor muscle is a muscle found in mollusks that is responsible for retracting the mantle. The mantle is a fold of skin that surrounds the internal organs of mollusks and plays a role in shell formation, respiration, and protection. The contraction of the mantle retractor muscle allows the mollusk to withdraw its soft body into the protective shell.
The squid gladius, also known as the pen, is a hard structure inside the squid's body that provides support and protection. It helps the squid maintain its shape and aids in movement by providing a structure for muscle attachment.
The function squid testis is to produce sperm during reproduction.
Almost all of the organs in a body have a function. A squid's liver helps in absorbing the food consumed by the squid.
the part of a squid's brain that controls the muscle siphon
Circular muscles help in extension and narrowing of the body of the earthworm. When circular muscles contract the protractor muscles relax causing the retractor muscles to contract, thus withdrawing the setae.
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