WebEarthworms use the prostomium to see their environment, as earthworms have no eyes, ears, nose or hands. They depend on the prostomium and skin to help it feel their way through the soil. As the earthworm tunnels … WebJun 19, 2016 · Students start with external anatomy, identifying structures like the clitellum, the setae, and the sperm ducts. Using dissecting scissors, students carefully expose the internal structures, like the crop, gizzard, …
Earthworm presentation - SlideShare
WebExternal features of an earthworm Head: the earthworm has a toothless mouth and no eyes. Instead, its skin has photoreceptors along its length, which are sensitive to light; Clitellum: only found in mature worms, this is a different coloured, smooth section of skin on its body. Found at the head side, it forms the cocoon for the eggs; WebFeb 13, 2016 · Pages: 1 - 4. Name. Date.52 Anatomy of the EarthwormBACKGROUND The earthworm is the best-known member of the phylum Annelida, the segmented worms.Annelids are bilaterally symmetrical, and their bodies are divided into segments both exter-nally and internally. They have a tube-within-a-tube body structure. The outer tube … laura fryer microsoft
EARTHWORM ANATOMY - EXTERNAL FEATURES - Iowa State …
WebInternal anatomy of an earthworm (lateral section): small, long, cylindrical animal without legs or hard body parts. Mouth cavity: entrance to the digestive tract of an earthworm. Pharynx: part of the digestive tract of an earthworm just after its mouth. Ventral nerve cord: set of nerves in the abdomen of an earthworm. WebOligochaeta (/ ˌ ɒ l ɪ ɡ ə ˈ k iː t ə,-ɡ oʊ-/) is a subclass of animals in the phylum Annelida, which is made up of many types of aquatic and terrestrial worms, including all of the various earthworms.Specifically, … WebMar 17, 2024 · The earthworm body is divided into ringlike segments (as many as 150 in L. terrestris). Some internal organs, including the … laura fryer buelow houston