A tube-like gadget called a spacer can help kids or people with trouble breathing use an HFA more easily. Dry powder inhalers (DPIs) require you to breathe in quickly and deeply. That can make them hard to use during an asthma attack when you canât fully catch a deep breath.
Some jellyfish are clear and can look like a plastic bag in the water. Others are in vibrant colors such as pink, yellow, blue, and purple, and often are luminescent.
There are four different types of jellyfish that are categorised by their shape and the way in which they behave. Despite the name, jellyfish are not actually fish but are instead classed in a group of their own as they are unlike any other animal on Earth.The body of the jellyfish is made up of a non-living jellylike substance called mesoglea. This jelly is surrounded by a layer of skin that is just one cell thick.he jellyfish use their tentacles to both catch and sting their prey. The tentacles of the jellyfish are covered in a skin that contains special cells, some that sting, some that grip and some that stick.