Crawfish structures

2. long ridge that runs lengthwise along the top of the head
3. food handling and drawing water over gills
5. swimmeret male: transfer sperm to female; female: carry eggs; both: water circulation for respiration
6. protective shell covering the crayfish
8. sight organ
9. walking leg walking
12. region on a crayfish comprised of the head and thorax
16. the long spike that sticks forward from the head between the eyes
18. groove semicircular notch that divides the head of the crayfish from the thorax
19. swimmeret male: transfer sperm to female
20. organs of balance, touch, and taste

1. touch, taste, and food handling
4. lower part of the body
5. walking leg walking and grasping
6. 1st walking leg used for defense, food capture and handling
7. sensory structure on the front of the head used to touch and feel
10. walking leg walking (male genital pore at base)
11. walking leg walking and grasping (female genital pore at base)
13. middle panel of the tail
14. the two pairs of fans on either side of the telson that make-up the tail; used for swimming
15. 4th, and 5th swimmeret - female: carry eggs; both: water circulation for respiration
17. crushing and chewing food