Phylum Annelida (K.1)

Question 1

Septa

Answer 1

Dividing tissue

Question 2

Crop

Answer 2

Storage organ in digestive system of earthworms and birds

Question 3

Gizzard

Answer 3

Organ used to grind food for effective digestion

Question 4

Dorsal blood vessel

Answer 4

Blood vessel that extends along organisms dorsal (back) side. Carry blood to the front of the earthworms body.

Question 5

Ventral blood vessel

Answer 5

Blood vessel that extends along organisms ventral (belly) side. Carry blood to the back of the earthworms body.

Question 6

Hearts (aortic arches)

Answer 6

Specialized organ of a circulatory system that contracts to pump blood

Question 7

Circular muscles

Answer 7

muscle layer encircling each segment (of an earthworm)

Question 8

Setae

Answer 8

Short bristle-like structures in earthworms that provide traction in soil (2pairs of setae per segment)

Question 9

Parapodia

Answer 9

Fleshy, muscular tissue that extend laterally from the segments of Class Polychaeta. Equipped with many bristles used for traction.

Question 10

Clitellum

Answer 10

Thickened, non-segmented section of the body wall near the anterior end of the earthworm. Secretes slime aiding in exchange of sperm.

Question 11

Cocoon

Answer 11

Sac containing earthworms eggs (formed at the clitellum)

Question 12

Proboscis

Answer 12

hollow tubular cephalic (relating the head) appendage