Please help
Match each phylum with the correct description

annelids: segmented body and closed circulatory

arthropods: jointed body parts and external skeleton

echinoderms: internal skeleton made of hardened plates

cnidarians: radial symmetry and stinging cells

Explanation:

i did it before and got it right

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]