Agriculture
Hungry bug seeks hot meal
Cleaning Up Fish Farms
Making the most of a meal
Amphibians
Newts
Salamanders and Newts
Bullfrogs
Animals
Bee Heat Cooks Invaders
From Chimps to People
No Fair: Monkey Sees, Doesn't
Behavior
Copycat Monkeys
Reading Body Language
Island of Hope
Birds
Albatrosses
Roadrunners
Owls
Chemistry and Materials
These gems make their own way
Watching out for vultures
Makeup Science
Computers
The Earth-bound asteroid scientists saw coming
Games with a Purpose
Supersonic Splash
Dinosaurs and Fossils
Fossil Fly from Antarctica
A Big, Weird Dino
An Ancient Spider's Web
E Learning Jamaica
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Results of GSAT are in schools this week
2014 GSAT Results for Jamaican Kids
Earth
A Grim Future for Some Killer Whales
Meteorites may have sparked life on Earth
Wave of Destruction
Environment
Fishing for Fun Takes Toll
Out in the Cold
Forests as a Tsunami Shield
Finding the Past
The Taming of the Cat
The Puzzle of Ancient Mariners
Digging Up Stone Age Art
Fish
Skates and Rays
Basking Sharks
Eels
Food and Nutrition
Turning to Sweets, Fats to Calm the Brain
Recipe for Health
Symbols from the Stone Age
GSAT English Rules
Adjectives and Adverbs
Problems with Prepositions
Pronouns
GSAT Exam Preparation Jamaica
GSAT Scholarship
Mastering The GSAT Exam
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
GSAT Exams Jamaica Scholarships
2014 GSAT Results for Jamaican Kids
GSAT Practice Papers | GSAT Mathematics | Maths
Results of GSAT are in schools this week
GSAT Mathematics
Prime Time for Cicadas
Math Naturals
How a Venus Flytrap Snaps Shut
Human Body
Football Scrapes and Nasty Infections
From Stem Cell to Any Cell
Smiles Turn Away Colds
Invertebrates
Crawfish
Beetles
Leeches
Mammals
Humans
Dachshunds
Weasels
Parents
Expert report highlights the importance to parents of reading to children!
Children and Media
How children learn
Physics
Road Bumps
Electric Backpack
Dreams of Floating in Space
Plants
Stalking Plants by Scent
Farms sprout in cities
Getting the dirt on carbon
Reptiles
Gila Monsters
Box Turtles
Crocodilians
Space and Astronomy
Zooming In on the Wild Sun
A Family in Space
Witnessing a Rare Venus Eclipse
Technology and Engineering
Crime Lab
Spinach Power for Solar Cells
Searching for Alien Life
The Parts of Speech
What is a Noun
What is a Preposition?
What is a Verb?
Transportation
Are Propellers Fin-ished?
Tinkering With the Basic Bike
Middle school science adventures
Weather
The Best Defense Is a Good Snow Fence
Warmest Year on Record
Science loses out when ice caps melt
Add your Article

Insects Take a Breather

Without oxygen, we'd be in big trouble. The gas, which makes up 21 percent of Earth's atmosphere, keeps alive the cells that make up our bodies. But there's such a thing as too much oxygen. Extra oxygen can damage tissues. Insects need oxygen to live, too, and they can also get too much. Two researchers now propose that many ants, grasshoppers, moths, and other insects sometimes stop taking in oxygen for hours or even days at a time to avoid overdosing. Insects breathe through little holes, or spiracles, that line their bodies. Oxygen enters through the spiracles, which lead to branching airways. Oxygen travels through these tubes to different parts of an insect's body and diffuses into the blood and gets used by cells. The cells release carbon dioxide, which is carried back to the spiracles. Insect spiracles can open and close. Scientists had suggested that this opening and closing of air holes helps prevent water loss. Stefan K. Hetz of Humboldt University in Berlin and Timothy J. Bradley of the University of California, Irvine now propose that insects do it to keep their tissues from getting too much oxygen. An insect's airways can deliver oxygen 200,000 faster than the blood vessels of mammals typically can, and they whisk away carbon dioxide about 10,000 times faster. All of this oxygen exchange could harm an insect's cells and tissue. To investigate this idea, the researchers inserted measuring probes into spiracles of Atlas moth pupae. The pupa is the stage at which the caterpillar wraps itself in a covering and, hidden away, turns into a moth. The researchers then varied the concentration of oxygen in the environment. The results showed that oxygen concentrations inside the airways of the moths stayed the same, even when oxygen concentrations outside of their bodies varied quite a bit. This finding suggests that the insects close their spiracles to avoid getting too much oxygen, the researchers say. Insects seem to be able to make sure they get just the right amount of a good thing.E. Sohn

Insects Take a Breather
Insects Take a Breather








Designed and Powered by HBJamaica.com™