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Martin Maksimov & Vladimir Peshev
<ul><li>Arthropod literary means “jointed feet” </li></ul><ul><li>That is where their name comes from </li></ul><ul><li>It...
<ul><li>Have bilateral symmetry </li></ul><ul><li>This is so because of their segmented and elongated bodies  </li></ul>
<ul><li>In 1950s was argued of who their ancestor is </li></ul><ul><li>It was said they are different groups </li></ul><ul...
<ul><li>1996 </li></ul><ul><li>NOWADAYS </li></ul>
<ul><li>Hard exoskeleton </li></ul><ul><li>Jointed segments </li></ul><ul><li>Pair of appendages at each one </li></ul><ul...
<ul><li>Most rely on sexual reproduction </li></ul><ul><li>Only few are hermaphroditic  </li></ul><ul><li>Depends on habit...
<ul><li>Almost all have hard chitin cover </li></ul><ul><li>It protects them from harm </li></ul><ul><li>Most have other “...
<ul><li>Using muscles </li></ul><ul><li>Exoskeleton provides points for attachment </li></ul><ul><li>The skeleton is repla...
<ul><li>Have a shiny, globular abdomen </li></ul><ul><li>Black and sometimes brown </li></ul><ul><li>Males about half the ...
<ul><li>Their body is protected by a hard, dark brown carapace </li></ul><ul><li>Have two large compound eyes and multiple...
<ul><li>Have antennae, shorter than the body </li></ul><ul><li>Have ovipositors </li></ul><ul><li>Females are usually larg...
<ul><li>Some arthropods spread numerous deadly diseases </li></ul><ul><li>Others feed on the crops that humans grow </li><...
<ul><li>Female Black Widow spiders often eat males after mating </li></ul><ul><li>Cute and Cuddly Dads: Black Widow Dads <...
<ul><li>&quot;Black Widow Spiders&quot;. Desert USA. 27.03.2010 <http://www.desertusa.com/july97/du_bwindow.html>.  </li><...
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Arthropoda martin 10-8

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Transcript of "Arthropoda martin 10-8"

  1. 1. Martin Maksimov & Vladimir Peshev
  2. 2. <ul><li>Arthropod literary means “jointed feet” </li></ul><ul><li>That is where their name comes from </li></ul><ul><li>It is a unique characteristic </li></ul><ul><li>Every 2 out of three – arthropod </li></ul><ul><li>10 to the 18 th species </li></ul>
  3. 3. <ul><li>Have bilateral symmetry </li></ul><ul><li>This is so because of their segmented and elongated bodies </li></ul>
  4. 4. <ul><li>In 1950s was argued of who their ancestor is </li></ul><ul><li>It was said they are different groups </li></ul><ul><li>Segmented bodies tell of another thing though </li></ul><ul><li>In 1990s it was discovered that arthropods are monophyletic </li></ul>
  5. 5. <ul><li>1996 </li></ul><ul><li>NOWADAYS </li></ul>
  6. 6. <ul><li>Hard exoskeleton </li></ul><ul><li>Jointed segments </li></ul><ul><li>Pair of appendages at each one </li></ul><ul><li>Antennae </li></ul><ul><li>Open circulatory system </li></ul><ul><li>Lack balance – rely on their eyes </li></ul>
  7. 7. <ul><li>Most rely on sexual reproduction </li></ul><ul><li>Only few are hermaphroditic </li></ul><ul><li>Depends on habitat: </li></ul><ul><li>In water – external fertilization </li></ul><ul><li>On ground – modified appendages </li></ul>
  8. 8. <ul><li>Almost all have hard chitin cover </li></ul><ul><li>It protects them from harm </li></ul><ul><li>Most have other “weapons”: </li></ul><ul><li>Venom </li></ul><ul><li>Pincers </li></ul><ul><li>Pedipalps </li></ul>
  9. 9. <ul><li>Using muscles </li></ul><ul><li>Exoskeleton provides points for attachment </li></ul><ul><li>The skeleton is replaced after time </li></ul><ul><li>The process is called molting </li></ul>
  10. 10. <ul><li>Have a shiny, globular abdomen </li></ul><ul><li>Black and sometimes brown </li></ul><ul><li>Males about half the female's size </li></ul><ul><li>Inhabit warmer regions </li></ul><ul><ul><li>45˚ N to 45˚ S in latitude </li></ul></ul><ul><li>The most venomous spider in North America </li></ul><ul><ul><li>Deaths from bite are very rare (1%) </li></ul></ul><ul><li>Spin webs that lack shape and form </li></ul><ul><ul><li>Their silk is stronger than almost all other arachnids </li></ul></ul><ul><ul><li>The spider usually stays hidden in its web </li></ul></ul><ul><li>Preys on insects </li></ul>
  11. 11. <ul><li>Their body is protected by a hard, dark brown carapace </li></ul><ul><li>Have two large compound eyes and multiple smaller simple ones </li></ul><ul><li>Have five pairs of legs for walking, swimming and moving food </li></ul><ul><li>Can swim upside down </li></ul><ul><li>Usually are found on the ocean floor </li></ul><ul><ul><li>search for worms and molluscs (their main food) </li></ul></ul><ul><li>Their blood is blue </li></ul><ul><ul><li>Due to hemoacyanine that is used to carry oxygen </li></ul></ul><ul><li>Amebocyte in their blood fights pathogens </li></ul>
  12. 12. <ul><li>Have antennae, shorter than the body </li></ul><ul><li>Have ovipositors </li></ul><ul><li>Females are usually larger than males </li></ul><ul><li>Big hind legs for jumping </li></ul><ul><li>2 pairs of wings: </li></ul><ul><ul><li>Forewings – narrow and relatively hard </li></ul></ul><ul><ul><li>Hind wings – large </li></ul></ul><ul><li>Grasshoppers are herbivores </li></ul><ul><li>Many of the species are green </li></ul><ul><ul><li>They are hard to find in green grass </li></ul></ul>
  13. 13. <ul><li>Some arthropods spread numerous deadly diseases </li></ul><ul><li>Others feed on the crops that humans grow </li></ul><ul><ul><li>Swarms can be highly destructive </li></ul></ul><ul><li>Lobsters, crabs, shrimp and others are important foods </li></ul><ul><li>Bees produce honey </li></ul><ul><li>Spiders help us by eating a huge number of insect pests </li></ul><ul><li>Horseshoe crabs yield important chemicals for making useful drugs </li></ul><ul><li>Grasshoppers are eaten in many places around the world, as a source of protein </li></ul>
  14. 14. <ul><li>Female Black Widow spiders often eat males after mating </li></ul><ul><li>Cute and Cuddly Dads: Black Widow Dads </li></ul><ul><ul><li>http://videos.howstuffworks.com/animal-planet/6615-cute-and-cuddly-dads-black-widow-dads-video.htm </li></ul></ul>
  15. 15. <ul><li>&quot;Black Widow Spiders&quot;. Desert USA. 27.03.2010 <http://www.desertusa.com/july97/du_bwindow.html>. </li></ul><ul><li>&quot;Grasshopper Information&quot;. Center for Insect Science Education Outreach . 27.03.2010 <http://insected.arizona.edu/ghopperinfo.htm>. </li></ul><ul><li>http://tolweb.org/Public/treeImages/Arthropoda.png?x=1543595564 </li></ul><ul><li>Campbell, Neil. &quot;Arthropods&quot;. Biology Eight Edition. San Francisco: Benjamin Cummings, 2008. </li></ul><ul><li>&quot;Introduction to Arthropoda&quot;. UCMP. 27.03.2010 <http://www.ucmp.berkeley.edu/arthropoda/arthropoda.html>. </li></ul><ul><li>http://en.wikipedia.org/wiki/Arthropod - picture </li></ul><ul><li>http://www.uic.edu/classes/bios/bios100/labs/bilateral.jpg - picture </li></ul><ul><li>http://en.wikipedia.org/wiki/Limulidae - picture </li></ul><ul><li>http://en.wikipedia.org/wiki/Grasshopper - picture </li></ul><ul><li>http://videos.howstuffworks.com/hsw/5805-human-interaction-with-arthropods-video.htm - video </li></ul>
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