External Anatomy Of Earthworm

The external body of an earthworm is well adapted for living in the soil similar to the external structure of other insects. Body consists of dorsal and ventral surfaces.

Internal Anatomy Earthworm Lateral Visual Dictionary

Earthworm anatomy external features.

External anatomy of earthworm. Set of nerves in the abdomen of an earthworm. The important external features are as follows. Anatomy of earthworm externally a thin non cellular cuticle covers the body wall of the earthworm.

It secretes the material for producing cocoons. 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. External anatomy of earthworm. Locate the clitellum which is on the anterior end of the worm.

Large band of the earthworm close to anterior end secretes mucus for the cocoon that the eggs are in. Examine your earthworm and determine the dorsal and ventral sides. External and internal anatomy of an earthworm study guide by anurin includes 19 questions covering vocabulary terms and more.

Earthworm is elongated long narrow cylindrical or vermiform shaped. Quizlet flashcards activities and games help you improve your grades. It is the swelling located from segments 33 to 37 and is near the anterior end.

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. Insects sea stars spiders jellyfish and millipedes are other examples of invertebrate animals. The front or head of the worm is called the anterior.

Entrance to the digestive tract of an earthworm. Internal anatomy of an earthworm lateral section. Locate the clitellum which is on the anterior end of the worm.

What is the external anatomy of an earthworm. That is they do not have a backbone. Pores to receive sperm from another worm during copulation and later to release that sperm for fertilization of the eggs.

The anterior end is tapering while the posterior end is more or less blunt. Small long cylindrical animal without legs or hard body parts. 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 ventral side appears flatter than the other side of the worm. Study the illustration of an earthworm shown on the left. Part of the digestive tract of an earthworm just after its mouth.

External morphology of earthworm. The very first section of the anterior contains the mouth and prostomium. The dorsal side is the worms rounded top.

The openings near the clitellum are the genital setae.

Earthworm Morphology Body Anatomy Concepts Questions And