Do jellyfish have muscles?

Answer 1

Jellyfish are marine invertebrates belonging to the Scyphozoan class. The body of an adult jellyfish is composed of a bell-shaped, jelly producing substance enclosing its internal structure, from which the creature's tentacles are suspended. Each tentacle is covered with stinging cells that can sting or kill other animals: most jellyfish use them to secure prey or as a defense mechanism. Others, such as Rhizostomae, do not have tentacles at all.

To compensate for a lack of basic sensory organs and a brain, the jellyfish exploits its nervous system and rhopalia to perceive stimuli, such as light or odor, and orchestrate expedient responses. In its adult form, it is composed of 94–98% water and can be found in every ocean in the world. Some jelly fish do have these body parts such as the box jelly fish.

Most jellyfish are passive drifters that feed on small fish and zooplankton that become caught in their tentacles. Jellyfish have an incomplete digestive system, meaning that the same orifice is used for both food intake and waste expulsion. They are made up of a layer of epidermis, gastrodermis, and a thick layer called mesoglea that produces most of the jelly and separates the epidermis from the gastrodermis.

Their shape is not hydrodynamic, which makes them slow swimmers but this is little hindrance as they feed on plankton, needing only to drift slowly through the water. It is more important for them that their movements create a current where the water (which contains their food) is being forced within reach of their tentacles. They accomplish this by rhythmically opening and closing their bell-like body.

Since jellyfish do not biologically qualify as actual "fish", the term "jellyfish" is considered a misnomer by some, who instead employ the names "jellies" or "sea jellies". The name "jellyfish" is also often used to denote either Hydrozoa or the box jellyfish, Cubozoa. The class name Scyphozoa comes from the Greek word skyphos, denoting a kind of drinking cup and alluding to the cup shape of the organism.

***The jelly is actually the structural support for the body (Jellyfish do not have bones) and is rigid enough to provide a bed against which muscles can pull during the swimming motion.***

Answer 2

Physiology

Jellyfish have no brain, blood, or heart, but they still manage to survive. Jellyfish have a bell-like body with tentacles flowing underneath. They may have one or more mouths in the center of their body, between the tentacles. Around the mouth(s) there are tiny, frilly arms. Jellyfish range in size from the thimble jellyfish, which are only a few centimeters, to the Lion's Mane jellyfish, who's tentacles can reach a length of over 100 feet. Most jellyfish are transparent and have a white to light blue tint to them. The jellyfish moves using a jet propulsion method. JELLYFISH HAVE SPECIAL MUSCLES on the underside of their body that contract and shoot out water, moving the jellyfish. Jellyfish also have special light sensory organs along the rim of the body. These organs can detect light and dark, but can't pinpoint exact objects. Dispite not having a brain, jellyfish can still taste and smell.

Answer 3

Do Jellyfish Have Muscles

Answer 4

Jellyfish do have muscles (as do all members of the phylun Cnidaria). They have "bell muscles" which pull on water-filled compartments. This is called a hydrostatic skeleton. In any case, the muscles run around the circumference of the umbrella-shaped medusal form, and when contracted pull the edges of the umbrella together. This pushes water out, and acts as a form of propulsion.

Answer 5

Yes, but their muscles are so undeveloped that they just go with the tide (worked well for them so far).

Answer 6

im not sure but im gonna say yes and just 2 tell
ya i just got stung by one about 4 days ago and it didnt fell good. it hurt

Answer 7

yes

Answer 8

Ya, otherwise they wouldn't be able to support themselves.

Answer 9

Only if they have big mouths

Answer 10

Yes, they do. they use them to swim.