Give one scientific term for the following:
1. Blood filled cavity in arthropods.
2.A collection of nerve cell bodies.
1. Haemocoel.
2. Ganglion
Provide appropriate technical term in the space provided.
(a) Blood-filled cavity in arthropods .........................
(b) Free-floating form of cnidaria.......................
(c) Stinging organ of jelly fishes......................
(d) Lateral appendages in aquatic annelids...........................