What is the lateral of an earthworm?
What is the lateral of an earthworm?
Internal anatomy of an earthworm (lateral section): small, long, cylindrical animal without legs or hard body parts.
What is the dorsal earthworm?
The longer region is the posterior or tail end of the earthworm. The top-side of an animal is called the dorsal surface. For example, the fin you see in all shark movies shows the dorsal fin of a shark just before it attacks. The dorsal surface of some species of earthworms is darker than its ventral surface.
What is the anterior earthworm?
Anterior. The ‘head’ or front of the earthworm is called its anterior.
Is earthworm transverse or longitudinal?
A common earthworm (L. terrestris ) can range from 110-200 mm in length with anywhere from 135-150 segments in its body. Each segment of the worm’s body contains muscles that work independently of every other segment. The internal walls separate the segments and are lined with circular and longitudinal muscles.
What are the parts of an earthworm?
Earthworms are segmented invertebrates with sections called annuli. Their digestive system is made of the mouth, pharynx, crop, gizzard, intestine and anus.
What is the posterior end of an earthworm?
anus
Find the anterior (front) end of the earthworm by locating the fleshy bump over its mouth, called the prostomium. The posterior (back) end has a small hole where solid waste is expelled, called the anus. The length of the worm is made up of many tiny segments, each separated by a thin wall called a septum.
What is a septa in earthworm?
The septum is a membrane that is flexible enough to allow for contraction of the internal muscles. Because the fluid cannot escape and does not contract, the earthworm can change shape, from rotund to flat, depending on the need and the accessibility of its location.
Are earthworms circular and longitudinal muscles used in locomotion?
An earthworm moves using circular and longitudinal muscles, as well as bristles called setae. The earthworm can push the setae out of its body to grab the soil around it. To move forward, the worm uses its setae to anchor the front of its body and contracts the longitudinal muscles to shorten its body.
What is classification of earthworm?
ClitellataEarthworm / Class
What is the classification of earthworms?
LumbricinaEarthworm / Scientific name