Gills/Respiratory
Senses
Reproduction
Digestive
Misc.
100
Internal gill pouches lead to the outside by external ______.
What are gill slits?
100
Sharks have the ability to determine the direction of a given _____ using their nasal sacs.
What is scent?
100
Sharks practice internal fertilization; for this reason, male sharks have _________ to help transfer sperm into the oviduct.
What are claspers?
100
Largest organ in the shark.
What is the liver?
100
These scales, also called denticles, are similar in structure to teeth, and have one median spine, and two lateral spines.
What is a placoid scale?
200
Typically sharks have between ___ and ____ gill slits.
What is 5 or 7?
200
This is an internal sense that allows sharks to detect vibrations in the water - it is primary used to find their prey in the water as well as the location of other sharks that may be in the area.
What is the lateral line?
200
Parthenogenesis has had at least two documented cases in sharks in which females gave birth ___________.
What is asexually?
200
A smooth, shiny membrane seen lining the inside of the body wall.
What is the peritoneum?
200
Due to their lack of swim bladder, sharks rely on their large _________ to stay bouyant. It contains oils filled with squalene.
What is the liver?
300
This organ allows sharks to receive water to their gills even when they are not swimming.
What are spiracles?
300
When sharks are being attacked or when they are attacking prey, sharks often do this with their eyes_____________.
What is rollback into their heads?
300
Oviparious sharks reproduce by _______________ and not by __________.
What is by laying eggs? Not live births.
300
The membrane in which visceral organs are suspended dorsally by a double membrane of peritoneum
What is mesentery ?
300
Sharks are cold blooded meaning their body temperature is based on their ambient surroundings. However large sharks often are referred to as _____________ blooded because they are so active they generate their own body heat?
What is warm blooded?
400
The gills are provided with a rich blood supply. Arteries run directly from the nearby heart to the gills bringing deoxygenated blood into the _______. Oxygen diffuses from the ventilating water current flowing over the gills into the blood.
What are gill lamellae (Gill filaments)
400
Like humans, and unlike teleost fish, SHarks have the ability to both ______ and ________ their pupils to help allow them see. (two answers)
What is contract and dilate ?
400
Oophagy has been documented in certain shark species. This means that in utero, some shark pups in Ovoviviparious species have been known for...
What is embryotic(intrauterine) canniballism?
400
The screw-like, symmetrical shape within the valvular intestine. It adds surface area for digestion and absorption to an otherwise relatively short intestine.
What is the spiral valve?
400
Filters the salt from the shark's blood. It is an off-white organ that is long and located caudally.
What is the rectal gland
500
A modified slit called a ________ lies just behind the eye; the ________ assists water intake during respiration and plays a major role in bottom–dwelling sharks. They tend to be reduced or missing in active pelagic sharks.
What are Spiracles
500
Electroreceptor organs that allows sharks to detect the electromagnetic fields produced by all surrounding life forms. Found cranially.
What is the Ampuellae of Lorenzini?
500
These are the three means in which sharks reproduce.
What is oviparity, viviparity and ovoviviparity?
500
The last portion of the alimentary canal. It collects the products of the colon as well as the urogenital ducts.
What is the cloaca?
500
The number of chambers in a shark's heart
What is 2?
M
e
n
u