Crab Anatomy

3. Organ that pumps in the circulatory system
5. Posterior-most division of body.
8. The shell covering the body that provides rigidity and protection. Part of the exoskeleton.
12. Shorter segmented appendages located between and below the eyestalks, act as sensory organs.
13. Thin dark membrane which lies beneath carapace.
15. Paired appendages used by crab for swimming.
17. Tough external covering of whole crab.
18. Female structure which hold egg mass.
19. Claw of cheliped.

1. Abdomen of crab, which is folded under the body.
2. The first pair of legs that carry a large claw.
4. Female opening of oviduct.
6. Paired points on the widest outside edges of the carapace.
7. Long segmented appendages located behind eyestalks; allow crab to interact with environment by tough and chemoreception.
9. Female gonads.
10. Male gonads.
11. Appendages used by crab for walking movement.
14. Internal organ that carry out gas exchange.
15. Organ of digestive system that breaks down ingested food.
16. Male appendage for transferring sperm.