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What does the word annelid mean in science?
annelid. / (ˈænəlɪd) / noun. any worms of the phylum Annelida, in which the body is divided into segments both externally and internally. The group includes the earthworms, lugworm, ragworm, and leeches.
Who named Annelida?
CSS :: Phylum Annelida
| [A]. | Linnaeus | Lamarck |
|---|---|---|
| [C]. | Dales | Schwann |
Why are Annelids called segmented worms?
Annelids are often called “segmented worms” because they possess true segmentation of their bodies, with both internal and external morphological features repeated in each body segment. Annelids possess a closed circulatory system, lack a well-developed respiratory system, but have well-developed nervous systems.
Where does the word platyhelminthes originate?
The name Platyhelminthes (pronounced “plat-ee-hel-MIN-theze”) is derived from the Greek root word platy meaning flat and the Greek root word helminth meaning worm. Flatworms live on land, in fresh water, in the ocean, and in or on other animals as parasites (e.g., tapeworms).
Is a millipede an annelid?
The Annelid phylum contains three classes of organisms: Polychaeta, Oligochaeta and Hirudinea. The Arthropoda phylum contains five classes: Crustacea (shrimp and lobster), Arachnida (spiders and scorpions), Chilopoda (centipedes), Diplopoda (millipedes) and Insecta (roaches and beetles).
Is a leech an annelid?
leech, (subclass Hirudinea), any of about 650 species of segmented worms (phylum Annelida) characterized by a small sucker, which contains the mouth, at the anterior end of the body and a large sucker located at the posterior end. All leeches have 34 body segments. Leeches occur primarily in fresh water and on land.
What best describe an annelid?
Annelids are segmented worms such as earthworms and leeches. Annelids have a coelom, closed circulatory system, excretory system, and complete digestive system. They also have a brain. Leeches are either predators or parasites.
Who discovered phylum Platyhelminthes?
PLATYHELMINTHES. Platyhelminthes (pla-te-hel-MIN-thes) is made of two Greek roots that mean “flat worms” [flat -plato (πλάτω); and worm -helmis (ελμισ)]. The reference is to the flattened nature of the animals in this phylum. The name was coined by Gegenbaur (1859).
Is a centipede an annelid?
Is an earthworm an annelid?
earthworm, also called angleworm, any one of more than 1,800 species of terrestrial worms of the class Oligochaeta (phylum Annelida)—in particular, members of the genus Lumbricus.