The two are blood and lymph
The answer is Echinoderms.
According to the Embryological studies, the most ancient chordates were closely related to the ancestors of the echinoderms. Echinoderms are members of the group Phylum Echinodermata of marine animals. Some known echinoderms are starfish, and sea cucumbers.
Answer:
1 quarter of a million especially young men who have dependents to go into the forestry and flood prevention work.
Metabolic pathways stimulate cell division.
