Shark Bio Flashcards
Ex. Groundsharks (1)
Carcharhiniformes
What two parts help extract oxygen
Gills and the spiracle
Ex. Frilled sharks (3)
Hexanchiformes
Ex. Bullhead sharks (2)
Heterodontiformes
Ex. Mackerel sharks (4)
Lamniformes
Ex. Carpet sharks (5)
Orectolobiformes
Ex. Saw sharks (6)
Pristiophoriformes
Ex. Dogfish (7)
Squaliformes
Ex. Angel sharks (8)
Squatiniformes
Sharks first appeared how many years ago?
400 million years
Fossil sharks were divided into which two groups
Xenacanths and hybodonts
What fossils showed evidence that they had been eaten by sharks
Marine mammal bones
How many families of sharks are there?
30 families (375 species)
Intestinal valve is either..
Spiral or scroll
Sharks skin is made of soft but prickly hairs called
Dermal denticles
Red muscle
- makes up 11% total muscle
- good blood supply
- used long term/slow swimming
White muscle
- used in fast/sprint swimming
- poor blood supply
- 89% total muscle
What percentage of sharks differ from original diagram?
40%
2 plankton feeder sharks?
Whale and basking
How many gill slits?
Usually 5, but can have up to 6 or 7
Teeth lie in the ____.
Tooth bed
Male reproductive organ is called
A clasper
Egg laying
Oviparous
Develop from eggs inside womb but come out live birth
Ovoviviparous
Viviparous
Live birth
Grooves and canals along back make up the
Lateral line
Electro sensory organs are called
Ampullae of lorenzini
