Agriculture
Fast-flying fungal spores
Growing Healthier Tomato Plants
Where Have All the Bees Gone?
Amphibians
Tree Frogs
Bullfrogs
Toads
Animals
Roach Love Songs
Polly Shouldn't Get a Cracker
Eyes on the Depths
Behavior
Nice Chimps
The Electric Brain
Reading Body Language
Birds
Parrots
Waterfowl
Owls
Chemistry and Materials
Sticking Around with Gecko Tape
Supersonic Splash
The Incredible Shrunken Kids
Computers
A New Look at Saturn's rings
Seen on the Science Fair Scene
New eyes to scan the skies
Dinosaurs and Fossils
The Paleontologist and the Three Dinosaurs
Three strikes wiped out woolly mammoths
From Mammoth to Modern Elephant
E Learning Jamaica
2014 GSAT Results for Jamaican Kids
Results of GSAT are in schools this week
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Earth
Groundwater and the Water Cycle
A Volcano's Deadly Ash
Wave of Destruction
Environment
Antarctica warms, which threatens penguins
Giant snakes invading North America
Indoor ozone stopper
Finding the Past
Fakes in the museum
Little People Cause Big Surprise
Salt and Early Civilization
Fish
Halibut
Sturgeons
Megamouth Sharks
Food and Nutrition
Food for Life
Allergies: From Bee Stings to Peanuts
Moving Good Fats from Fish to Mice
GSAT English Rules
Who vs. That vs. Which
Finding Subjects and Verbs
Who vs. Whom
GSAT Exam Preparation Jamaica
GSAT Practice Papers | GSAT Mathematics | Maths
Scotiabank Jamaica Foundation Grade Six Achievement Test (GSAT) Scholarships
10 Common Mistakes When Preparing for the GSAT Math Test
GSAT Exams Jamaica Scholarships
GSAT Practice Papers | GSAT Mathematics | Maths
Access denied - Disabled boy aces GSAT
GSAT Scholarship
GSAT Mathematics
Secrets of an Ancient Computer
Setting a Prime Number Record
Math Naturals
Human Body
A Long Haul
Dreaming makes perfect
Don't Eat That Sandwich!
Invertebrates
Oysters
Daddy Long Legs
Roundworms
Mammals
Mule
Wombats
Otters
Parents
Expert report highlights the importance to parents of reading to children!
The Surprising Meaning and Benefits of Nursery Rhymes
Children and Media
Physics
Strange Universe: The Stuff of Darkness
Road Bumps
Gaining a Swift Lift
Plants
Making the most of a meal
The algae invasion
Getting the dirt on carbon
Reptiles
Snapping Turtles
Copperhead Snakes
Reptiles
Space and Astronomy
Baby Star
Wrong-way planets do gymnastics
A Puffy Planetary Puzzle
Technology and Engineering
Searching for Alien Life
Drawing Energy out of Wastewater
Are Propellers Fin-ished?
The Parts of Speech
What is a Preposition?
Pronouns
What is a Verb?
Transportation
Middle school science adventures
How to Fly Like a Bat
Troubles with Hubble
Weather
Where rivers run uphill
The solar system's biggest junkyard
Watering the Air
Add your Article

Lungfish

Lungfishes are sarcopterygian fish belonging to the order Dipnoi. Sarcopterygii (from Greek sarx, flesh, and pteryx, fin) are bony fish with paired rounded fins. These fins, being similar to limbs, suggest that these fish may be ancestors of land vertebrates. The dentition of lungfish is conspicuously different from that of any other vertebrate group. Odontodes on the palate and lower jaws develop in a series of rows to form a fan-shaped occlusion surface. These odontodes then wear to form a uniform crushing surface. In several groups, including the modern lepidosireniformes, these ridges have been modified to form occluding blades. The modern lungfishes have a number of larval features, which suggest paedomorphosis. They also demonstrate the largest genome among the vertebrates. Modern lungfish all have an elongate body with fleshy paired pectoral and pelvic fins and a single unpaired caudal fin replacing the dorsal, caudal, and anal fin of most fishes. African and South American lungfish are capable of surviving seasonal drouts by burrowing into mud and estivating throughout the dry season. Changes in physiology allow the lungfish to slow its metabolism to 1/60th of the normal metabolic rate, and protein waste is converted from ammonia to less-toxic urea (normally, lungfish excrete nitrogenous waste as ammonia directly into the water). Burrowing is seen in at least one group of fossil lungfish, the Gnathorhizidae. Lungfish are best-known for retaining characteristics primitive within the Osteichthyes, including the ability to breathe air, and structures primitive within Sarcopterygii, including the presence of lobed fins with a well-developed internal skeleton. Today, they live only in Africa, South America, and Australia. While vicariance would suggest this represents an ancient distribution limited to the Mesozoic supercontinent Gondwana, the fossil record suggests that advanced lungfish had a cosmopolitan freshwater distribution and that the current distribution of modern lungfish species reflects extinction of many lineages following the breakup of both Pangea and subsequently Gondwana and Laurasia.

Lungfish
Lungfish








Designed and Powered by HBJamaica.com™