"Holothurians" Natural Recordings by Native Speakers
Holothurians are a group of marine animals that belong to the class Holothuroidea. They are commonly known as sea cucumbers, a name that comes from their cucumber-like shape. Holothurians are characterized by their elongated bodies, soft and flexible skin, and their ability to use their many tentacles to capture small organisms and particles from the sea floor.
Holostome refers to a type of worm or annelid that does not have a set home or fixed habitat. These worms are typically free-living and can be found in a variety of environments, including soil, freshwater, and marine ecosystems. Within the phylum Annelida, the class Polychaeta contains several species that are considered holostomes.
Holostraca is a term used in bacteriology to describe a type of Gram-positive bacteria that has a granular, crystalline structure. In a Gram staining test, it typically appears as a Gram-positive bacterium, meaning it retains the violet dye used in the test, producing a characteristic blue-purple color. The term Holostraca was originally used by the German bacteriologist Robert Koch to describe certain bacterial species that exhibited this distinctive staining pattern.
Holotricha is a type of protozoan, specifically a ciliate, which is a microscopic organism that belongs to the phylum Ciliophora. It is characterized by its distinctive holotrichous cilium, which means that its entire body is covered in a single row of cilia, rather than having cilia only on certain parts of its body like many other ciliates.
Holozoically refers to the process of cellular digestion, where a cell ingests and breaks down the external environment, absorbing the nutrients and releasing waste products.