Internal anatomy of an earthworm (lateral section): small, long, cylindrical animal without legs or hard body parts.
Mouth cavity: entrance to the digestive tract of an earthworm.
Pharynx: part of the digestive tract of an earthworm just after its mouth.
Ventral nerve cord: set of nerves in the abdomen of an earthworm.
Seminal receptacle: pocket related to the semen of an earthworm.
Ventral blood vessel: blood vessel situated in the front part of an earthworm.
Nephridium: organ of an earthworm that performs the functions of kidneys.
Gizzard: pocket used as the stomach of an earthworm.
Dorsal blood vessel: blood vessel situated in the rear part of an earthworm.
Crop: bulge of the esophagus of an earthworm.
Seminal vesicles: small hollow organs that carry the semen of an earthworm.
Lateral heart: blood-pumping organ of an earthworm.
Esophagus: part of the digestive tract of an earthworm between the pharynx and the crop.
Brain: brain of an earthworm.