Blood tube see blood channel

blood vessel Any vessel or canal facilitating blood circulation.

blotch n. [OF. block, a clod of earth] A large irregular spot or marking.

blunt v. [uncertain origin] To dull; to neutralize or dilute.

boat-shaped see navicular, scaphoid body n. [A.S. bodig, body] 1. The physical structure of an organism. 2. The main part of an organism as compared to its limbs or appendages. 3. The trunk. 4. The corpus.

body cavity The principal cavity between the body wall and internal organs of an organism: coelom, pseudocoelom or hemocoelom.

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