Earthworm Anatomy Labeling Quiz

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.