Earthworm Anatomy Labeling Quiz

Questions and Answers

What are aortic arches?

Part of the nervous system

Muscular stomach

Segment of the intestine

Blood vessels in earthworms (correct)

What is the function of the gizzard?

Grinding food

What does the intestine do?

Digests food and absorbs nutrients

What is the citellum?

A thickened, glandular section of the body Signup and view all the answers

What is the role of the crop in an earthworm?

Stores food Signup and view all the answers

What is the function of the esophagus in earthworms?

Transports food from the mouth to the crop Signup and view all the answers

What does the ventral blood vessel do?

Carries blood toward the rear Signup and view all the answers

What is the function of the ventral nerve cord?

Transmits nerve impulses Signup and view all the answers

What is the role of the pharynx?

Helps in swallowing food Signup and view all the answers

What are setae?

Hair-like structures that help in movement Signup and view all the answers

What is the function of the mouth in earthworms?

Entry point for food Signup and view all the answers

What does the anus do?

Excretes waste Signup and view all the answers

What is the brain (ganglia) in earthworms?

Nervous system center Signup and view all the answers

What does anterior refer to in the context of earthworms?

The front part of the body Signup and view all the answers

Study Notes

Earthworm Anatomy

Aortic arches: Act as a heart-like structure for pumping blood throughout the body, essential for circulation and maintaining blood pressure.
Gizzard: A muscular digestive organ that grinds food, aiding in the breakdown of organic material before it enters the intestine.
Intestine: The primary site for digestion and nutrient absorption, featuring regions specialized for different absorption processes.
Ciltellum: A thickened, glandular section of the body wall that secretes mucus for cocoon formation during reproduction.
Crop: A storage organ where food is temporarily held before it moves to the gizzard for grinding.
Esophagus: A muscular tube that connects the mouth and crop to the gizzard, facilitating the passage of food.
Ventral blood vessel: Part of the circulatory system, running along the underside of the earthworm, assisting in transporting blood.
Ventral nerve cord: A major part of the nervous system, running along the belly and coordinating movement and responses.
Pharynx: The muscular portion of the digestive system that helps in swallowing and moving food to the esophagus.
Setae: Bristle-like structures on the body that provide traction and help in locomotion through soil.
Mouth: The entry point for food, located at the anterior end, where the digestive process begins.
Anus: The posterior opening where waste is expelled from the body after digestion.
Brain (ganglia): A cluster of nerve cells located near the anterior end, acting as the control center for sensory and motor functions.
Anterior: The front end of the earthworm, where the mouth and sensory structures are located, essential for movement and feeding.

Description

Test your knowledge of the anatomy of an earthworm with this labeling quiz. Identify the key parts, including the aortic arches, gizzard, and ventral nerve cord. Perfect for biology students focusing on invertebrate anatomy.