External Anatomy Of Earthworm

Locate the clitellum which is on the anterior end of the worm. Small long cylindrical animal without legs or hard body parts.

Earthworm Anatomy Earthworms Worm Farm Anatomy

Body consists of dorsal and ventral surfaces.

External anatomy of earthworm. Anatomy of earthworm externally a thin non cellular cuticle covers the body wall of the earthworm. External morphology of earthworm. The front or head of the worm is called the anterior.

External and internal anatomy of an earthworm study guide by anurin includes 19 questions covering vocabulary terms and more. Entrance to the digestive tract of an earthworm. Pores to receive sperm from another worm during copulation and later to release that sperm for fertilization of the eggs.

The skin of segments fourteenth fifteenth and sixteenth is swollen and pale in mature worms to form a saddle shaped structure called clitellum or cingulum. External anatomy of earthworm. Underneath this cuticle a layer of the epidermis followed by two muscle layers and coelomic epithelium inner layer is sheathed.

Every segment of the body excepting the clitellar and the first and last. Examine your earthworm and determine the dorsal and ventral sides. The ventral side appears flatter than the other side of the worm.

The important external features are as follows. Earthworm is elongated long narrow cylindrical or vermiform shaped. What is the external anatomy of an earthworm.

Part of the digestive tract of an earthworm just after its mouth. Earthworm anatomy external features. That is they do not have a backbone.

Internal anatomy of an earthworm lateral section. It secretes the material for producing cocoons. The external body of an earthworm is well adapted for living in the soil similar to the external structure of other insects.

The very first section of the anterior contains the mouth and prostomium. It is the swelling located from segments 33 to 37 and is near the anterior end. Large band of the earthworm close to anterior end secretes mucus for the cocoon that the eggs are in.

Insects sea stars spiders jellyfish and millipedes are other examples of invertebrate animals. The dorsal side is the worms rounded top. Quizlet flashcards activities and games help you improve your grades.

Set of nerves in the abdomen of an earthworm. Locate the mouth of the worm on the far anterior end of the wormthe openings toward the anterior of the worm are the sperm ducts. The anterior end is tapering while the posterior end is more or less blunt.

Examine your earthworm and determine the dorsal and ventral sides. The openings near the clitellum are the genital setae. Study the illustration of an earthworm shown on the left.

Locate the clitellum which is on the anterior end of the worm.

Earthworm Anatomy