External Anatomy Of Earthworm

Internal anatomy of an earthworm lateral section. External and internal anatomy of an earthworm study guide by anurin includes 19 questions covering vocabulary terms and more.

Earthworm Anatomy Dissections Anatomy

Underneath this cuticle a layer of the epidermis followed by two muscle layers and coelomic epithelium inner layer is sheathed.

External anatomy of earthworm. Earthworm is elongated long narrow cylindrical or vermiform shaped. Part of the digestive tract of an earthworm just after its mouth. Entrance to the digestive tract of an earthworm.

The very first section of the anterior contains the mouth and prostomium. 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. It is the swelling located from segments 33 to 37 and is near the anterior end.

Examine your earthworm and determine the dorsal and ventral sides. It secretes the material for producing cocoons. Anatomy of earthworm externally a thin non cellular cuticle covers the body wall of the earthworm.

Every segment of the body excepting the clitellar and the first and last. The external body of an earthworm is well adapted for living in the soil similar to the external structure of other insects. Locate the clitellum which is on the anterior end of the worm.

The ventral side appears flatter than the other side of the worm. Small long cylindrical animal without legs or hard body parts. Locate the clitellum which is on the anterior end of the worm.

Earthworm anatomy external features. Examine your earthworm and determine the dorsal and ventral sides. Insects sea stars spiders jellyfish and millipedes are other examples of invertebrate animals.

Set of nerves in the abdomen of an earthworm. What is the external anatomy of an earthworm. External morphology of earthworm.

The front or head of the worm is called the anterior. The dorsal side is the worms rounded top. The openings near the clitellum are the genital setae.

External anatomy of earthworm. Study the illustration of an earthworm shown on the left. 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.

Body consists of dorsal and ventral surfaces. Pores to receive sperm from another worm during copulation and later to release that sperm for fertilization of the eggs. Large band of the earthworm close to anterior end secretes mucus for the cocoon that the eggs are in.

That is they do not have a backbone. The important external features are as follows. The anterior end is tapering while the posterior end is more or less blunt.

Quizlet flashcards activities and games help you improve your grades.

Earthworms