biodiversity vertebratesvs invertebrates
TRANSCRIPT
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BiodiversityVertebrates vs. Invertebrates
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Vertebrates
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What are Vertebrates?• Vertebrates are creatures with
backbones or spinal columns. • The term Vertebrata is used in
scientific classifications as a subphylum of chordates.
• The name comes from the vetebrate bones that make up the spinal column.
• Generally most of the animals we are familiar with are vertebrates.
• Fish, amphibians, reptiles, birds and mammals are all vertebrates.
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Characteristics of Vertebrates•-backbone or spinal column
•-muscular system that consist of mainly paired masses
•-central nervous system
•-generally vertebrates have endoskeletons
•-a distinguishable head that house sensory organs
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DID YOU KNOW?• About 57, 739 species of vertebrates
have been described.• Vertebrates started to evolve about 530
million years ago.• Both the vertebral column and the
limbs support the body of the vertebrate overall.
• The contour of the body of a vertebrate is formed by the muscles.
• The central nervous system of a vertebrate consists of the brain and the spinal cord.
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Invertebrates
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What is an Invertebrate?• Almost 97% of all animal life on the
planet are invertebrates.• Invertebrates are animals without
spinal columns or backbones.• They have specialized cells to
facilitate movement.• Invertebrates have various means of
reproduction.• Some possess exoskeletons, or no
skeletal structures at all.
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Examples of Invertebrates• Porifera — sponges • Cnidarians — jellyfish • Platyhelminthes— flatworms • Nematoda — roundworms • Annelida — earthworms • Echinodermata — starfish, sea urchins,
sea cucumbers • Mollusca — squid, snails • Arthropoda — ticks, spiders,
grasshoppers, lobsters, crabs • Bryozoa — moss animals, sea mats
(occasionally resemble corals)