GENERAL ANATOMY Sharks are fish that have no bones, only cartilage. They have 5-7 gills (without gill covers, operculum) in front of their pectoral fins (on both sides). Shark tails are asymmetrical; the top lobe of tail is larger than the bottom lobe. The shark's jaw is not fused to the braincase and can enlarge to eat very large prey. Sharks have no swim bladder for buoyancy (like the bony fishes); an oily liver aids buoyancy. Sharks have an advanced electroreceptive system that detects slight electrical fields. The teeth and skin are modified placoid scales. A spiracle (a special gill slit that supplies oxygen directly to the eyes and brain) is present in front of the first gill. Sharks' teeth are replaceable when they've broken or worn out. Their intestines are short and compact and have an unusual structure; a spiral valve (shaped like a spiral staircase) fills the cylindrical intestines and allows absorption of the food in a short span of intestine.
also look at this website to have info pages on specific sharks:
here is a quiz made for a third grade class(so it is really easy):
Shark Find It! Quiz
Name_______________________________________Use the Little Explorers picture dictionary to answer the following questions.
1. Look in the dictionary entry for "Shark." Do sharks have a skeleton made from bones or from cartilage? ____________________
2. This shark's name starts with an "A." It lives on the sea floor and has a flat body. What is it called? ______________________
3. This shark's name starts with a "B." It is a huge shark that eats very tiny animals. What is it called? _______________________
4. This shark's name starts with a "B." It has blue skin and swims very fast. What is it called? ____________________
5. This shark's name starts with a "C." It takes circular bites out of its prey. What is it called? _____________________
6. This shark's name starts with a "D." It is a very common shark and is found all over the world. What is it called? _______________
7. This shark's name starts with a "G." It has pinkish skin and a very long, pointed snout. What is it called? ___________________
8. This shark's name starts with a "G." It is a large and very famous predator. What is it called? ___________________________________
9. This shark's name starts with an "H." It has an unusually-shaped head that looks like a common carpenter's tool. What is this shark called? _____________________________
10. This shark's name starts with an "L." It has yellowish skin. What is it called? __________________
11. This shark's name starts with an "M." It is a fast-swimming shark with bluish skin. What is it called? _______________________
12. This shark's name starts with an "M." It is a long-extinct predator that lived millions of years ago. What is it called? ____________________
13. This shark's name starts with a "T." Its tail has a very long upper part. What is this shark called? _____________________________
14. This shark's name starts with a "T." It is a large, aggressive shark that has faint stripes on its skin. What is this shark called? __________________________
15. This shark's name starts with a "W." It is the biggest shark and the biggest fish! What is it called? _____________________________
here is another shark anatomy:
sorry it ended up at the top of this post and I don't know how to move it down hereLabel the Shark: Anatomy
Animal PrintoutsLabel Me! Printouts
Read the definitions, then label the shark diagram below. (Note: not all sharks have all of the fins and spines defined below.)
anal fin - the fin on the lower side of the body near the tail (not on all sharks)
caudal fin - the tail fin
eye - sight organs located on the head
fin spine - a protective spine located at the base of the first dorsal fin (not all sharks have fin spines)
first dorsal fin - the fin on the upper side of the body nearest the head
gills - fleshy organs that are used for breathing - they are located on the side of the head
mouth - the part of the body which the fish uses to catch food - it is located at the front of the body
nostril - paired slits on the underside of the snout. Water continually flows through the nostrils, giving the shark olfactory (sense of smell) information. Unlike humans, shark nostrils have nothing to do with breathing - they are not even connected to the mouth.
pectoral fin - each of the paired fins on either side of the body, near the head
pelvic fin - each of the small, paired fins on the lower rear side of the body
second dorsal fin - the fin on the upper side of the body nearest the tail
snout - the front part of the shark's head
ventral fin - each of the paired fins on the lower side of the body, near the head
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