Polyps have a tubular shape and are fastened at their base, with the mouth facing the water at the other end of the tube. Medusa has a bell-shaped body with hanging tentacles. Polyp does not have a manubrium. The Hydrozoa class’s Medusa has a manubrium, a tube that hangs from the bell.
What is the difference between the polyp and medusa form of cnidarians?
Medusa is a mobile life cycle stage of the Cnidaria phylum, contracting with it muscular bell. Polyp have a tubular shape and are fixed at their base, with the mouth present at the other end of the tube facing the water. Medusa have a bell shape, with tentacles hanging down. Polyp do not have a manubrium.
How are polyp and medusa related?
polyp and medusa, names for the two body forms, one nonmotile and one typically free swimming, found in the aquatic invertebrate phylum Cnidaria (the coelenterates). Some animals of this group are always polyps, some are always medusae, and some exhibit both a polyp and a medusa stage in their life cycle.
Do polyps turn into medusa?
Cnidarians come in two basic shapes. An anemone is the polyp shape. If the polyp shape is turned upside down, it becomes the medusa shape of the jellyfish.
Is a jellyfish a medusa or polyp?
Throughout their lifecycle, jellyfish take on two different body forms: medusa and polyps. Polyps can reproduce asexually by budding, while medusae spawn eggs and sperm to reproduce sexually. Learn more about the lifecycle and reproduction of jellyfish.
What is the function of medusa?
Hydrozoan Anatomy
The medusa form is generally small and short-lived. Its primary function is to carry out sexual reproduction and to allow the species to disperse to different locations.
What is the difference between the medusa and polyp stages in the life cycle?
Most of the Cnidarian classes utilise polyp and medusa as two stages of their life cycle. Polyps are sessile and asexually reproduce by budding. But, medusa reproduces sexually by producing sperms and eggs. The key difference between polyp and medusa is that polyp is sessile whereas medusa is free-swimming.
Is a hydra a medusa or polyp?
Hydra can exist in both forms namely a polyp and a medusa throughout their life cycle. The hydra can exist in its adult and sexual form which is
Is medusa free swimming?
The medusa is a free-swimming form; it moves by rhythmic muscular contractions of the bell, providing a slow propulsive action against the water. The other principal body type of the adult cnidarian is the polyp, a stalked, sessile (attached) form.
What polyp means?
Polyps are tissue growths that most often look like small, flat bumps or tiny mushroom-like stalks. Most polyps are small and less than half an inch wide. Uterine and colon polyps are the most common, but it’s also possible to develop polyps in places that include the: ear canal. cervix.
How do medusa reproduce?
In the adult, or medusa, stage of a jellyfish, they can reproduce sexually by releasing sperm and eggs into the water, forming a planula.
Is coral a polyp or medusa?
Classes. In the class Anthozoa, comprising the sea anemones and corals, the individual is always a polyp; in the class Hydrozoa, however, the individual may be either a polyp or a medusa, with most species undergoing a life cycle with both a polyp stage and a medusa stage.
What are jellyfish babies called?
Each polyp will bud off many baby jellyfish called ephyrae that grow very quickly into adult medusae.
How is a jellyfish immortal?
In response to physical damage or even starvation, they take a leap back in their development process, transforming back into a polyp. In a process that looks remarkably like immortality, the born-again polyp colony eventually buds and releases medusae that are genetically identical to the injured adult.
