Agriculture
Earth-Friendly Fabrics
Treating peanut allergy bit by bit
Hungry bug seeks hot meal
Amphibians
Newts
Salamanders and Newts
Bullfrogs
Animals
Revenge of the Cowbirds
A Jellyfish's Blurry View
Young Ants in the Kitchen
Behavior
A Recipe for Happiness
How Much Babies Know
Chimpanzee Hunting Tools
Birds
Pigeons
Kingfishers
Tropical Birds
Chemistry and Materials
Spinning Clay into Cotton
A Framework for Growing Bone
The newest superheavy in town
Computers
Graphene's superstrength
A Classroom of the Mind
Batteries built by Viruses
Dinosaurs and Fossils
Dino Bite Leaves a Tooth
Teeny Skull Reveals Ancient Ancestor
The man who rocked biology to its core
E Learning Jamaica
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
2014 GSAT Results for Jamaican Kids
Results of GSAT are in schools this week
Earth
Warmest Year on Record
Earth's Lowly Rumble
Slower Growth, Greater Warmth
Environment
Cactus Goo for Clean Water
A Change in Time
Improving the Camel
Finding the Past
Oldest Writing in the New World
Ancient Cave Behavior
Untangling Human Origins
Fish
Tuna
Barracudas
Mahi-Mahi
Food and Nutrition
Moving Good Fats from Fish to Mice
Chew for Health
Packing Fat
GSAT English Rules
Finding Subjects and Verbs
Capitalization Rules
Who vs. Whom
GSAT Exam Preparation Jamaica
GSAT Exam Preparation
The Annual GSAT Scholarships
March 21-22, 2013: Over 43,000 students will take the GSAT Exam
GSAT Exams Jamaica Scholarships
42,000 students will sit for the GSAT Exam in two weeks
GSAT Exam Preparation
Access denied - Disabled boy aces GSAT
GSAT Mathematics
Math is a real brain bender
Math of the World
How to Slice a Cake Fairly
Human Body
From Stem Cell to Any Cell
Kids now getting 'adult' disease
Workouts: Does Stretching Help?
Invertebrates
Sea Anemones
Black Widow spiders
Ticks
Mammals
Miniature Schnauzers
Rodents
Polar Bear
Parents
How children learn
Raise a Lifelong Reader by Reading Aloud
What Not to Say to Emerging Readers
Physics
Einstein's Skateboard
One ring around them all
Road Bumps
Plants
Surprise Visitor
Underwater Jungles
Bright Blooms That Glow
Reptiles
Snapping Turtles
Chameleons
Gila Monsters
Space and Astronomy
A Very Distant Planet Says "Cheese"
Asteroid Moons
World of Three Suns
Technology and Engineering
A Light Delay
Toy Challenge
Young Scientists Take Flight
The Parts of Speech
Countable and Uncountable Nouns
What is a Preposition?
What is a Noun
Transportation
Reach for the Sky
Charged cars that would charge
Troubles with Hubble
Weather
Watering the Air
Polar Ice Feels the Heat
In Antarctica watch the heat (and your step)
Add your Article

Mussels

The term mussel is used for several families of bivalve mollusks inhabiting lakes, rivers, and creeks, as well as intertidal areas along coastlines worldwide. The freshwater mussels (several allied families, the largest being the Unionidae) and saltwater mussels (family Mytilidae) are not closely related, and are grouped in different subclasses, despite some similarities in appearance. The freshwater Zebra mussels and their relatives (family Dreissenidae) live attached to rocks in a manner similar to marine mussels, but are classified with the Heterodonta, the taxonomic group including most bivalves referred to as "clams". External anatomy: The mussel's external shell is composed of two valves that protect it from predators and desiccation. Protruding from a valve is an enlarged structure called the umbo, which indicates the dorsal surface of the mussel. Foot: Like most bivalves, mussels have a large organ referred to as a foot, which is tongue-like in shape with a groove on the ventral surface, which is continuous with the byssus pit. In this pit a viscous secretion is poured out which enters the groove and hardens gradually when it comes into contact with sea water. This forms an extremely tough byssus thread that secures the mussel to its substrate. Feeding: Both marine and freshwater mussels are filter feeders that feed on plankton. They do so by drawing water in through their incurrent siphon. The water is then brought into the branchial chamber by the actions of the cilia located on the gills for cilliary-mucus feeding. The waste water exits out through the excurrent siphon. The labial palps finally funnel the food into the mouth where digestion can continue. Clumping: Marine mussels are usually found clumping together on the wave-washed rocks with one another, which anchors them against the force of the waves. Those mussels found in the middle of a clump will have less water loss due to water capture by the other mussels. Predators: Marine mussels in the wild are eaten by starfish, while living freshwater mussels are a favored source of food for muskrats, otters, raccoons and other mammals. Outside fertilization: Both marine and freshwater mussels are gonochoristic, with separate male and female individuals. In marine mussels, fertilization occurs outside the body, and there is a larval stage that drifts for a period of from three weeks to six months before settling down on a hard surface as a young mussel. There, it is capable of moving slowly by means of attaching and detaching byssal threads to attain a better life position. Flushing oxygen-rich water: Freshwater mussels also reproduce sexually. Sperm released by the male directly into the water enters the female via the incurrent siphon. After fertilization, the eggs develop into the larval stage called glochidia. The glochidia grow in the gills of the female where they are constantly flushed with oxygen-rich water. For a time, these glochidia are parasitic on fish, attaching themselves to the fish's fins or gills. They grow and then break free from the host and drop to the bottom of the water. If they land in a place that suits their needs, they will continue their development and begin their independent life. Freshwater mussel glochidia are generally species-specific and will only live if they find the correct fish host. Reproduction in the Dreissenidae (zebra mussels and their relatives) is similar to that of the marine mussels.

Mussels
Mussels








Designed and Powered by HBJamaica.com™