What is the function of the earthworm clitellum quizlet?

What is the function of the earthworm clitellum quizlet?

What is the function of the clitellum, the only organ visible externally on earthworms? It secretes mucus that is important in reproduction. The worm alternates between extension and pulling the rest of its body after the extension.

What clitellum means?

: a thickened glandular section of the body wall of some annelids that secretes a viscid sac in which the eggs are deposited.

Is the clitellum located on an earthworm?

The clitellum is part of the reproductive system of earthworms. It is a thick saddle-like ring found in the epidermis (skin) of the worm. It is a non-segmented glandular section near the head at the anterior end of the body. It secretes a viscid sac where eggs are stored.

Do all worms have a clitellum?

The number of segments from the peristomium to the clitellum and the number of segments which make up the clitellum are species specific in earthworms. This means that if two earthworms have different numbers of segments leading up to the start of the clitellum, they are different earthworm species.

What is the clitellum quizlet?

Clitellum: series of anterior segments enclosed in thick glandular epidermis; encompasses females gonopores and secretes mucus. Hermaphrodites, zygotes develop in a coccon and emerge and juveniles, direct development.

What structure is not used in earthworm locomotion?

The basic features of locomotion in annelids are most easily observed in the earthworm because it lacks appendages and parapodia. Movement involves extending the body, anchoring it to a surface with setae, and contracting body muscles.

What is the purpose of excretory openings in earthworms?

In earthworm, the nephridia functions for the removal of the excretory wastes both from blood and the coelomic fluid. There are 3 types of nephridia based on the structure and location: Septal nephridia or typical nephridia: Enteronephric nephridia.

What is the bump on an earthworm?

The bump is the clitellum, the saddle shaped swollen area 1/3 of the way back containing the gland cells which secrete a slimy material (mucus) to form the cocoon which will hold the worm embryos.

When earthworms mate the clitellum does which of the following?

How do earthworms mate and reproduce? At ages 4-6 weeks, they find another worm, attach by the clitellum, exchange sperm, and then forms a cocoon.

What is the locomotion of earthworm?

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.