Sea nettles

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Other Animals

Animals are a major group of organisms, classified as the kingdom Animalia or Metazoa. In general they are multicellular, capable of locomotion and responsive to their environment, and feed by consuming other organisms. more...

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BirdsBirds
CatsCats
DogsDogs
FerretsFerrets
FishFish
Guinea PigsGuinea Pigs
HorsesHorses
Other AnimalsOther Animals
RabbitsRabbits
ReptilesReptiles
RodentsRodents
Sugar GlidersSugar Gliders
Tadpoles & FrogsTadpoles & Frogs
TurtlesTurtles

Their body plan becomes fixed as they develop, usually early on in their development as embryos, although some undergo a process of metamorphosis later on.

The name animal comes from the Latin word animal, of which animalia is the plural, and ultimately from anima, meaning vital breath or soul.

Characteristics

Aristotle divided the living world between animals and plants, and this was followed by Carolus Linnaeus in the first hierarchical classification. Since then biologists have begun emphasizing evolutionary relationships, and so these groups have been restricted somewhat. For instance, microscopic protozoa were originally considered animals because they move, but are now treated separately.

Kingdom Animalia has several characteristics that set it apart from other living things. Animals are eukaryotic and multicellular, which separates them from bacteria and most protists. They are heterotrophic, generally digesting food in an internal chamber, which separates them from plants and algae. They are also distinguished from plants, algae, and fungi by lacking cell walls.

Structure

With a few exceptions, most notably the sponges (Phylum Porifera), animals have bodies differentiated into separate tissues. These include muscles, which are able to contract and control locomotion, and a nervous system, which sends and processes signals. There is also typically an internal digestive chamber, with one or two openings. Animals with this sort of organization are called metazoans, or eumetazoans when the former is used for animals in general.

All animals have eukaryotic cells, surrounded by a characteristic extracellular matrix composed of collagen and elastic glycoproteins. This may be calcified to form structures like shells, bones, and spicules. During development it forms a relatively flexible framework upon which cells can move about and be reorganized, making complex structures possible. In contrast, other multicellular organisms like plants and fungi have cells held in place by cell walls, and so develop by progressive growth. Also, unique to animal cells are the following intercellular junctions: tight junctions, gap junctions, and desmosomes.

Reproduction and development

Nearly all animals undergo some form of sexual reproduction. Adults are diploid or occasionally polyploid. They have a few specialized reproductive cells, which undergo meiosis to produce smaller motile spermatozoa or larger non-motile ova. These fuse to form zygotes, which develop into new individuals.

Many animals are also capable of asexual reproduction. This may take place through parthenogenesis, where fertile eggs are produced without mating, or in some cases through fragmentation.

Read more at Wikipedia.org


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		Perfect Coat Deodorizing Bath Wipes for Dogs (100 ct)
		Perfect Coat Deodorizing Bath Wipes for Dogs (100 ct) 
		Lot of 2 Pink Cat Teasers Wand Toys With Plush and Jungle Ball
		Lot of 2 Pink Cat Teasers Wand Toys With Plush and Jungle Ball

		Crabworx Water Dish, Red, Hermit Crab,1860, Free Shipping, by Hagen,Supplies
		Crabworx Water Dish, Red, Hermit Crab,1860, Free Shipping, by Hagen,Supplies 
		Coffee Masters, Flavored Highlander Grogg, Ground
		Coffee Masters, Flavored Highlander Grogg, Ground

		Fes Five Flower Formula Essence 1oz Spray Dr. Bach's
		Fes Five Flower Formula Essence 1oz Spray Dr. Bach's 
		8-in-1 J7100 Pet Dog Cat Eye Wipe Pads 90 count
		8-in-1 J7100 Pet Dog Cat Eye Wipe Pads 90 count

		Crazy Dog Baby Dog Green Apple Shampoo For Dogs (12 oz)
		Crazy Dog Baby Dog Green Apple Shampoo For Dogs (12 oz) 
		Central Aquatics Aqueon Water Conditioner (16 fl oz)
		Central Aquatics Aqueon Water Conditioner (16 fl oz)

		Bitch Pills (60 tabs)
		Bitch Pills (60 tabs) 
		Tear Stain (65 Soft Chews)
		Tear Stain (65 Soft Chews)

		Handmade Oak Pet Urn - Pyramid Top Series - 75 Cu In Capacity
		Handmade Oak Pet Urn - Pyramid Top Series - 75 Cu In Capacity 
		Premier Pogo Plush (Large)
		Premier Pogo Plush (Large)

		Fruitables Dog Treats Pumpkin & Apple (7 oz)
		Fruitables Dog Treats Pumpkin & Apple (7 oz)

		Cattle Cow Nylon Halter - 3 Sizes * 5 Colors
		Cattle Cow Nylon Halter - 3 Sizes * 5 Colors 
		New Tatco Crowd Control Posts, Chrome, 41" High, Silver
		New Tatco Crowd Control Posts, Chrome, 41" High, Silver

		Doggles Heps Pet Dog Cat Sunscreen 2 oz Spray Bottle Water-Based Spf 15
		Doggles Heps Pet Dog Cat Sunscreen 2 oz Spray Bottle Water-Based Spf 15 
		New Pet Scratching Hemp Post w. Cute Mouse Head Toy
		New Pet Scratching Hemp Post w. Cute Mouse Head Toy

		Cockatiels digital photograph for desktop or personal use
		Cockatiels digital photograph for desktop or personal use 
		Douxo Calm Shampoo (6.8 fl. oz.)
		Douxo Calm Shampoo (6.8 fl. oz.)

		Super Pet Hamster Potty
		Super Pet Hamster Potty 
		Pet Loo Replacement Grass (33" x 33")
		Pet Loo Replacement Grass (33" x 33")

		Hot Pink Custom Made Goat Collar Medium, 3/4" x 22"- 24" made from Beta Biothane
		Hot Pink Custom Made Goat Collar Medium, 3/4" x 22"- 24" made from Beta Biothane 
		Cat Mate 4 Way Locking Cat Flap
		Cat Mate 4 Way Locking Cat Flap

		Total-Zymes Plus Pro-Biotics (90 Chewable Tablets)
		Total-Zymes Plus Pro-Biotics (90 Chewable Tablets) 
		Gimborn R-7 Ear Powder (12grams)
		Gimborn R-7 Ear Powder (12grams)

		PetFlex Flexible Cohesive Bandage
		PetFlex Flexible Cohesive Bandage 
		Dogswell Happy Hips for Dogs, Chicken Breast,15-Ounc​e Pouches (Pack of 3)
		Dogswell Happy Hips for Dogs, Chicken Breast,15-Ounc​e Pouches (Pack of 3)

		3-Pack Bonies Natural Calming Minis 6 Bones (2.10 oz)
		3-Pack Bonies Natural Calming Minis 6 Bones (2.10 oz) 
		Tetra ReptoMin Floating Food Sticks (3.7 oz)
		Tetra ReptoMin Floating Food Sticks (3.7 oz)

		Kong Blue - Xtra Large
		Kong Blue - Xtra Large 
		French Old poster vintage Animal Cat school classroom france made in Normandy 
		French Old poster vintage Animal Cat school classroom france made in Normandy

		Petthrive Soft Chews for Dogs (12 oz)
		Petthrive Soft Chews for Dogs (12 oz) 
		3 Pack ChloraSeb Pledget Wipes (150 ct)
		3 Pack ChloraSeb Pledget Wipes (150 ct)

		Jolly Pets Push-N-Play Jolly Ball (10 in)
		Jolly Pets Push-N-Play Jolly Ball (10 in) 
		8-in-1 J803 Excel Hydrocortisone Spray 4 oz
		8-in-1 J803 Excel Hydrocortisone Spray 4 oz

		Kittywalk Kwtc249 Town & Country Collection
		Kittywalk Kwtc249 Town & Country Collection 
		Casual Canine Sweet Pea Costume - Medium
		Casual Canine Sweet Pea Costume - Medium

		3 Hermit Crab Shells Assorted Painted Seashells Turbo Item Lot # 331A
		3 Hermit Crab Shells Assorted Painted Seashells Turbo Item Lot # 331A 
		Crabworx Beach Scoop, Red, Hermit Crab,18157, Free Shipping, 2 Per Pack,Supplies
		Crabworx Beach Scoop, Red, Hermit Crab,18157, Free Shipping, 2 Per Pack,Supplies

		Ware Mfg Home Sweet Home 28" Small Animal Cage 01991
		Ware Mfg Home Sweet Home 28" Small Animal Cage 01991 
		Vetericyn Universal HydroGel Spray Gel (16oz Trigger)
		Vetericyn Universal HydroGel Spray Gel (16oz Trigger)

		Ant Cockroach Killer Chalk 5g Free Ship
		Ant Cockroach Killer Chalk 5g Free Ship 
		Crabworx Feeding Dish, Red, Hermit Crab,1862, Free Shipping, by Hagen,Supplies
		Crabworx Feeding Dish, Red, Hermit Crab,1862, Free Shipping, by Hagen,Supplies

		French Vintage Map Antique of Paris France school classroom Art Deco mid century
		French Vintage Map Antique of Paris France school classroom Art Deco mid century 
		Tetra Bloodworms Freeze Dried Food (0.28 oz)
		Tetra Bloodworms Freeze Dried Food (0.28 oz)

		Pet Clippers 2 Speed Professional Trimmer Oster A5 Series Compatible Ac-9000
		Pet Clippers 2 Speed Professional Trimmer Oster A5 Series Compatible Ac-9000 
		Puppysmarts Training Lessons Dvd, Dog, Puppy, Pet, 6 lessons on 1 Dvd
		Puppysmarts Training Lessons Dvd, Dog, Puppy, Pet, 6 lessons on 1 Dvd

		Pop up Travel Kitty Home
		Pop up Travel Kitty Home 
		Tiny White-Lipped Forest Snails. 1/4" Pair, & Habitat Kit, Great and Easy Pets!
		Tiny White-Lipped Forest Snails. 1/4" Pair, & Habitat Kit, Great and Easy Pets!

		John Paul Pet Tea Tree Treatment Shampoo (16 oz)
		John Paul Pet Tea Tree Treatment Shampoo (16 oz) 
		Tetra Betta Bowl Desktop Aquarium (1.8 Liters)
		Tetra Betta Bowl Desktop Aquarium (1.8 Liters)

		Pearly Whites N-Bone - Small
		Pearly Whites N-Bone - Small 
		K&H Thermo-Kitty Bed Sage 16"
		K&H Thermo-Kitty Bed Sage 16"

		Graphite Cow Cattle Rope Halter - Weaver Usa - 4 Colors
		Graphite Cow Cattle Rope Halter - Weaver Usa - 4 Colors 
		TetraFin Goldfish Crisps (2.86 oz)
		TetraFin Goldfish Crisps (2.86 oz)

		3 Pack Cranberry D-Mannose Urinary Tract Support (180 Tabs)
		3 Pack Cranberry D-Mannose Urinary Tract Support (180 Tabs) 
		8-in-1 I630 Flea & Tick Shampoo 32 oz Pet Dog Cat
		8-in-1 I630 Flea & Tick Shampoo 32 oz Pet Dog Cat

		Vetericyn 019Vet-1100 Vetericyn Pink Eye Wash 16 Oz Trigger Bottle
		Vetericyn 019Vet-1100 Vetericyn Pink Eye Wash 16 Oz Trigger Bottle 
		Pet Dog Cat Automatic Water Dispenser Dish Bowl Feeder
		Pet Dog Cat Automatic Water Dispenser Dish Bowl Feeder

		8-in-1 M733 Hairball Remedy Seafood 4.25 oz
		8-in-1 M733 Hairball Remedy Seafood 4.25 oz 
		New Bird Cage Kit - Starter Set + Perches + Feeders
		New Bird Cage Kit - Starter Set + Perches + Feeders

		3 Pack Angels Eyes Beef Flavor for Cats (90 gm)
		3 Pack Angels Eyes Beef Flavor for Cats (90 gm) 
		Busy Buddy Linkables Orb Dog Toy
		Busy Buddy Linkables Orb Dog Toy

		Fluval Water Polishing Pad for 104/105/204/20​5 Models (3 pack)
		Fluval Water Polishing Pad for 104/105/204/20​5 Models (3 pack) 
		Doggles Sgmtxs17 K9 Optix Extra Small Copper Dog Sun Glasses
		Doggles Sgmtxs17 K9 Optix Extra Small Copper Dog Sun Glasses

		Co2 Generator Controller System Set Carbon Dioxide
		Co2 Generator Controller System Set Carbon Dioxide 
		8-in-1 J7108 Excel Aspirin 81 mg 120 count Caps Capsules
		8-in-1 J7108 Excel Aspirin 81 mg 120 count Caps Capsules

		Extra Large Sticky silicone Lint/Pet fur Roller-Stickie​r than the one seen on Tv
		Extra Large Sticky silicone Lint/Pet fur Roller-Stickie​r than the one seen on Tv 
		TetraMin Large Tropical Flakes (2.82 oz)
		TetraMin Large Tropical Flakes (2.82 oz)

		▶ New Small Mag Float Glass Magnet Cleaner Algae Magnetic Scrubber Surface ◄ 
		▶ New Small Mag Float Glass Magnet Cleaner Algae Magnetic Scrubber Surface ◄ 
		Vetoquinol Viralys (L-Lysine) Powder (100 grams)
		Vetoquinol Viralys (L-Lysine) Powder (100 grams)

		New Oral Syringe Bottle Press In Adapter Kit
		New Oral Syringe Bottle Press In Adapter Kit 
		Natural Touch Oxy-Force Spot Remover & Cleaner Cs-81271
		Natural Touch Oxy-Force Spot Remover & Cleaner Cs-81271

		3 Pack K-Plus Potassium Citrate Plus Cranberry (300 Tabs)
		3 Pack K-Plus Potassium Citrate Plus Cranberry (300 Tabs) 
		TetraColor Tropical Flakes Plus (7.06 oz)
		TetraColor Tropical Flakes Plus (7.06 oz)

		SuperPet CritterTrail Treat Zone Habitat
		SuperPet CritterTrail Treat Zone Habitat 
		8-in-1 J7315 Calming Tablets 60 count Tabs Pills Pet Stress Relief
		8-in-1 J7315 Calming Tablets 60 count Tabs Pills Pet Stress Relief

		Lot of 2 Blue Doggy Dog Toy Treat Food Travel Bags
		Lot of 2 Blue Doggy Dog Toy Treat Food Travel Bags 
		Dingo Munchy Bits (3.5 oz)
		Dingo Munchy Bits (3.5 oz)

		New Tatco Crowd Control Rope, Velour, 6 ft, Black 11116
		New Tatco Crowd Control Rope, Velour, 6 ft, Black 11116 
		Akoma Dog Products Hc-1001 Hound Cooler Cold Water for Pets
		Akoma Dog Products Hc-1001 Hound Cooler Cold Water for Pets

		Tetra Carbon Filters Large (4 pack)
		Tetra Carbon Filters Large (4 pack) 
		8-in-1 J715 Erliworm Liquid Wormer 4 oz Roundworm Remover Removal
		8-in-1 J715 Erliworm Liquid Wormer 4 oz Roundworm Remover Removal

		Kittywalk Kwpspink 5th Ave Pet Dog Cat Stroller Pink
		Kittywalk Kwpspink 5th Ave Pet Dog Cat Stroller Pink 
		Missing Link Equine Formula With Joint Support Plus for Horses 5 lb
		Missing Link Equine Formula With Joint Support Plus for Horses 5 lb

		8-in-1 I634 Natural Oatmeal Dog Cat Pet Shampoo 32 oz
		8-in-1 I634 Natural Oatmeal Dog Cat Pet Shampoo 32 oz 
		Ourpet's 5" Iq Treat Ball (Assorted)
		Ourpet's 5" Iq Treat Ball (Assorted)

		Procone Soft Recovery Collar - Large
		Procone Soft Recovery Collar - Large 
		Busy Buddy Tug-A-Jug - Extra Small
		Busy Buddy Tug-A-Jug - Extra Small

		Tetra Water Wonders Aquarium Plant Ambulia 12"
		Tetra Water Wonders Aquarium Plant Ambulia 12" 
		Pet Clippers 1 Speed Professional Trimmer With Guard Attachments Gts-888
		Pet Clippers 1 Speed Professional Trimmer With Guard Attachments Gts-888

		Blue Plastic Litter Tray Scoop for Pet Kitten Cat
		Blue Plastic Litter Tray Scoop for Pet Kitten Cat 
		Tetra Water Clarifier (16.9 oz)
		Tetra Water Clarifier (16.9 oz)

		Get Naked Low Calorie Dog Treats (12 oz.)
		Get Naked Low Calorie Dog Treats (12 oz.) 
		G & B Marketing Procollar Blue Extra Large-Pc00008
		G & B Marketing Procollar Blue Extra Large-Pc00008

		Sterling silver Tiffany/fire hydrant dog/cat tag/to attach to your pet's collar
		Sterling silver Tiffany/fire hydrant dog/cat tag/to attach to your pet's collar 
		Frolick Playser Multiple Images Laser Pointer Rainbow Dog Pet Toy
		Frolick Playser Multiple Images Laser Pointer Rainbow Dog Pet Toy

		3 - Pack Lickety Stik Bacon (5.07 oz)
		3 - Pack Lickety Stik Bacon (5.07 oz) 
		French Old poster vintage Animal Snail plate educational school classroom france
		French Old poster vintage Animal Snail plate educational school classroom france
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Prices current as of last update, 05/17/12 9:30am.

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