ventral centralization and cephalization

Question 1

increased longitudinal centralization

Answer 1

nervous tissue is arranged in longitudinal nerve fibers

Question 2

cephalization

Answer 2

the enlargement of nerve tissue in the anterior region of an organisms body

Question 3

ventral nerve cord

Answer 3

connected by the transverse nerves

Question 4

transverse nerves

Answer 4

run between the two nerve cords

Question 5

anterior ganglia

Answer 5

medial to the eyespots

Question 6

what organisms presents a ventral nerve cord, transverse nerves, and anterior ganglia?

Answer 6

planaria

Question 7

double ventral nerve cord

Answer 7

the conversion of annelids from the two nerve cords into the midline of the organisms body

Question 8

segmental ganglia

Answer 8

controls movement within each segment

Question 9

segmented nerves

Answer 9

contain both sensory and motor neurons branching off and innervate the body wall muscles

Question 10

what organism contains the double ventral nerve cord?

Answer 10

earthworm and anthropod

Question 11

rudimentary brain

Answer 11

formed by increased cephalization and anterior ganglia are enlarged or fused at the anterior end

Question 12

dorsal nerve cord

Answer 12

where pairs of nerves branch at each segment

Question 13

notochord

Answer 13

supporting rod of connective tissue deep into the nerve cord