Chordates
Upcoming SlideShare
Loading in...5
×
 

Chordates

on

  • 880 views

 

Statistics

Views

Total Views
880
Views on SlideShare
880
Embed Views
0

Actions

Likes
0
Downloads
34
Comments
0

0 Embeds 0

No embeds

Accessibility

Categories

Upload Details

Uploaded via as Apple Keynote

Usage Rights

CC Attribution License

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment
  • <br />
  • <br />
  • <br />
  • <br />
  • <br />
  • <br />
  • <br />
  • <br />
  • <br />
  • <br />
  • <br />
  • <br />
  • <br />
  • <br />
  • <br />
  • <br />

Chordates Chordates Presentation Transcript

  • The Chordates
  • Class Osteichthyes * fish with bony skeletons * most breathe exclusively through gills * most are ectothermic, but some (swordfish and tuna, for example) have a primitive capability of internally regulating body temperature * usually externally fertilized eggs, but some fertilize internally * some species are hermaphrodites * sometimes reproduce by parthenogenesis (asexual reproduction in which organism develops from an unfertilized egg)
  • Example -Amphiprion akindynos The Barrier Reef Anemonefish cc licensed flickr photo by richard ling: http://flickr.com/photos/rling/4004358946/ View slide
  • Class Amphibia * metamorphose from aquatic juvenile form to air breathing adult form * 4 legs * lay eggs in water (a few exhibit complete internal development even passing through juvenile form internally) * bare skin * adults have primitive lungs but most also breathe through their skin * 3 chambered heart View slide
  • Example - Spea hammondii Western Spadefoot Toad cc licensed flickr photo by squamatologist: http://flickr.com/photos/squamatologist/2243856850/
  • Class Reptilia * air-breathing * cold-blooded * most reproduce sexually, parthenogenesis is also known * lay tough shelled eggs, some carry eggs internally so the young hatch internally * skin is covered by scales * heart consists of 3 chambers * 2 atria bring blood into the heart * 1 ventricle sends blood out from heart which can be partially divided * most are carnivores with short guts * digestion occurs slowly due to low metabolism
  • Example - Varanus komodoensis Komodo Dragon cc licensed flickr photo by Ken Lund: http://flickr.com/photos/kenlund/3712780657/
  • Class Aves * 4 limbs - 2 wings and 2 legs * Bipedal - walk upright on hind limbs (legs) * warm-blooded * lay hard-shelled eggs * body covered with feathers * mouth includes a beak with no teeth * high metabolic rate with a 4 chambered heart to rapidly and effeciently carry oxygen to body cells * lightweight skeleton * most can fly - some have wings adapted for other functions * Large brain, relative to size. Visual and flight control areas are most developed.
  • Example - Aptenodytes forsteri Emperor Penguin cc licensed flickr photo by elisfanclub: http://flickr.com/photos/elisfanclub/4270190237/
  • Class Mammalia * 4 limbs * some forms are bipedal * some have front limbs adapted for aquatic habitats * air-breathing * endothermic - internally regulate body temperature * high metabolism with 4 chambered heart * body covered with fur or hair * internal fertilization, most have internal development of embryo/fetus leading to live birth * females nurse young * sweat glands (including mammary glands to produce milk)
  • Example - Balaenoptera musculus Blue Whale cc licensed flickr photo by flickkerphotos: http://flickr.com/photos/38504374@N02/3600141170/
  • What about us?
  • Domain: Eukarya • Large brains Kingdom: Animalia • Highly developed visual cortex Phylum: Chordates Class: Mammalia • Vision is stereoscopic and detects 3 Order: Primates colours • 5 digits on limbs with opposable thumbs; well developed tactile sense on ends of digits • Wide range of movement in shoulder joint • reduced number of teeth compared to other mammals
  • Domain: Eukarya • Relatively large Kingdom: Animalia • No tail Phylum: Chordates Class: Mammalia • Use hands for gathering food, tool Order: Primates use Family: Hominidae • Exhibit some degree of bipedalism (knuckle walking in most) • Omnivorous with fruit being preferred food (except in humans)
  • Domain: Eukarya • Includes humans and closely Kingdom: Animalia related species Phylum: Chordates Class: Mammalia • All extinct except modern humans Order: Primates • Homo neanderthalis died out Family: Hominidae 24000 years ago Genus: Homo • Homo floresiensis died out 12000 years ago (controversial) • Large brain with highly developed cerebrum • Tool use • Sparse hair covering body
  • Domain: Eukarya • Modern humans Kingdom: Animalia • Highly developed brain, capable of Phylum: Chordates language, reasoning and problem- Class: Mammalia solving Order: Primates Family: Hominidae • Upright body Genus: Homo • Childbirth is relatively dangerous Species: Homo sapiens due to large cranial size of young and relatively narrow pelvis (needed for fully upright posture) • Omnivorous with a wide variety of diets (from vegan to mostly carnivore) • Use fire to cook food