Question

How do crabs breathe underwater?             

Answer 1

Crabs breathe through gills, which are located on the underside of their exoskeleton. As water passes over the gills, oxygen is extracted and carbon dioxide is released. The oxygen is then transported throughout the crab's body by the circulatory system. Some species of crabs are able to breathe air for short periods of time, but they still primarily rely on their gills to extract oxygen from water.

Answer 2

Crabs breathe underwater through gills

. Aquatic invertebrates such as lobster, crabs, and shrimps have external sensory hairs and internal statocysts to detect acoustic signals. Golden ghost crabs are semi-terrestrial and breathe oxygen from the air through moistened gills. They must periodically wet their gills with seawater, usually by taking water from moist sand or burrows

. Freshwater crabs are able to tolerate freshwater conditions or are secondarily adapted to fresh water. They breathe in air, which has preadapted them for terrestrial living, although they need to return to water periodically to excrete ammonia.  Hermit crabs breathe through gills but do not have to carry around their water to do so, and most can survive briefly out of water as long as their gills remain moist .

Answer 3

The animals which is known as the crab breathes through thier gills these is the way some aquatic animals which are lobster, shrimps they breathe through thier gills.

Answer 4

Crabs breathe underwater using gills, which are located in their abdomen. They take in water through openings called "ostia" and then pump it over their gills to extract oxygen. Some species can also absorb oxygen through their exoskeleton or the surfaces of their walking legs.

Answer 5

Crabs have gills located on the underside of their bodies that extract oxygen from water, allowing them to breathe underwater and extract oxygen for respiration.

Answer 6

Just like other aquatic animals crabs use gills on their skin surface to obtain oxygen from the water in order to successfully breath and survive 

Answer 7

Like many other Crustaceans, crabs breathe through their gills under the water. Gills are complex structures that absorbs oxygen from the water through diffusion and pass it into the bloodstream of the crab where it is utilized. 

Answer 8

Crabs have gills, which are specialized organs for extracting oxygen from water. These gills are located inside the branchial chamber, a cavity beneath the carapace (the hard shell covering their body). As water passes over the gills, oxygen is absorbed into the crab's bloodstream, and carbon dioxide is released back into the water.

Crabs have a constant flow of water over their gills facilitated by movement of their appendages, such as their walking legs and swimmerets. Some crabs can also pump water over their gills by moving their mouthparts or using specialized structures called maxillipeds.

It's important for crabs to keep their gills moist and protected to ensure efficient gas exchange. When crabs are out of the water, they may periodically return to moist areas or splash water over themselves to maintain proper hydration and oxygen uptake.