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Arthropods

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Arthropods 7th Grade Life Science Crayfish Excretory System Anus-- excretes waste from intestine Green Glands Filter waste out of the crayfish work ... – PowerPoint PPT presentation

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Title: Arthropods


1
Arthropods
  • 7th Grade Life Science

2
3 Characteristics of all Arthropods
  • Body Segments
  • Jointed Legs
  • Exoskeleton

3
Exoskeleton hard outer covering that protects,
covers and allows for muscle attachment.
4
4 Classes of Arthropods
  • Insects
  • Arachnids
  • Centipedes and Millipedes
  • Crustaceans

5
Insects
  • Three Body Regions Head, Thorax Abdomen
  • 3 pairs of legs on the thorax
  • Breath through spiracles on the abdomen

6
Metamorphosischange in shape (meta change/
morph shape)
  • Incomplete metamorphosisnymphs look more and
    more like adults
  • Complete metamorphosis larva undergo complete
    change to become an adult

7
Complete or Incomplete Metamorphosis??
8
Complete or Incomplete Metamorphosis??
9
Complete or Incomplete Metamorphosis??
10
Complete or Incomplete Metamorphosis??
11
Complete or Incomplete Metamorphosis??
12
4 Classes of Arthropods
  • Insects
  • Arachnids
  • Centipedes and Millipedes
  • Crustaceans

13
Arachnids
  • Spiders
  • Scorpions
  • Mites and Ticks

14
4 Classes of Arthropods
  • Insects
  • Arachnids
  • Centipedes and Millipedes
  • Crustaceans

15
Centipedes and Millipedes
  • Centipedes predators
  • Millipedes herbivores

16
4 Classes of Arthropods
  • Insects
  • Arachnids
  • Centipedes and Millipedes
  • Crustaceans

17
Crustaceans
  • Crayfish
  • Crabs
  • Shrimp
  • Pill bugs

18
Crabs
19

Shrimp
20
Pill Bugs
21
Crayfish
  • Kingdom Animal
  • Phylum Arthropoda
  • Class Malacostraca
  • Order Decapoda
  • Family Cambaridae
  • Genus -- Cambarus

22
Crayfish Anatomy
  • Form Function

23
Crayfish Circulatory System
Open Circulatory System Blood is carried from
the heart in Arteries. Used blood pools and
returns to the heart through ostia (no veins
to return blood)
24
Crayfish Circulatory System
Ostia -- Holes in the heart where blood
re-enters to be pumped
25
Crayfish Respiratory System
Gills-- are located at the side of the body
Gills function to exchange Oxygen and Carbon
Dioxide for Cellular Respiration.
26
Crayfish Respiratory System
Gills-- are located at the side of the body
Gills function to exchange Oxygen and Carbon
Dioxide for Cellular Respiration.
27
Crayfish Digestive System
  • Mandible
  • Esophagus
  • 2 Part Stomach
  • Intestine
  • Anus

28
Crayfish Digestive System
Two-- Part Stomach
29
Crayfish Digestive System
Cardiac Stomach Stores Food
30
Teeth in stomach help to grind food
31
Crayfish Digestive System
Pyloric Stomach Digestion Occurs (digestive
enzymes from digestive gland break down food )
32
Crayfish Digestive System
Pyloric Stomach pyloric muscles on the side of
the pyloric stomach help grind food
33
Crayfish Digestive Glands Produce digestive
enzymes similar to our liver
34
Crayfish Excretory System
  • Anus-- excretes waste from intestine
  • Green Glands Filter waste out of the crayfish
    work similar to our kidneys
  • Green glands secrete uric acid near the antennae.

35
Green Glands
36
The End
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