Transcript Insects! - Cloudfront.net

5/10 & 5/11 - 7th Grade Agenda
Learning Objective: Learn about
arachnids & echinoderm
Collect HW: Reading Notetaking 209 –
212
Microviewer Lab – Central Nervous
System
Video: Life in the Undergrowth
Textbook Reading 438 – 439
HW: Reading & Notetaking 213 – 216
Reflection
• Prompt: Describe 2 differences between
insects and arachnids.
What are Arthropods?
Arthro = “Jointed”
Pod = “Foot”
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Insects
Spiders
Scorpions
Lobster
Crab
Shrimp
Centepedes
Comparing Arthropods
What are Crustaceans?
• two or three body
sections
• five or more pairs of
legs
• two pairs of
antennae.
Crustaceans
What is Metamorphosis?
• Process in which
an animal’s body
undergoes
dramatic changes
during its life cycle
• This is a picture of
a Crab Larva
Some arthropods have blue
blood
• Horseshoe crabs have blue
blood
• The have hemocyanin (which
contains copper) instead of
hemoglobin (which contains iron)
in their blood
• They are more closely related to
spiders and scorpions
• Has not changed much in 450
million years
Insects!
of all animal
Which
type73%
of animal
is most
species are
insects.
numerous
in the
world?
What are the characteristics of
insects?
• Invertebrates (Doesn’t have a
backbone)
• Exoskeleton (Exo = outside,
skeleton)
• Arthropod (Arthro = joined, Pod =
Leg)
• 3 pairs of legs
• 1 pair of antennae
• Most insects have wings
What are Insect’s Three Body
Sections?
Head
Thorax
Abdomen
What is found on an
insect’s Head?
• Head: Most of an insect’s sense organs, such
as the eyes, mouth and antennae, are located
on the head.
What is found on an
insect’s Thorax?
• Thorax: An insect’s midsection is the section to
which wings and legs are attached.
What is found on an
insect’s Abdomen?
• Abdomen: Inside the abdomen are many of the
insect’s internal and sexual organs. Small holes on
the outside of the abdomen allow air, which contains
oxygen, to enter the body.
What is Complete Metamorphosis?
Caterpillar Anatomy
What is Gradual Metamorphosis?
How big is the world’s largest
Insect
• Titan Beatle
• 7 inches long
Can you spot an insect here?
• Dead Leaf mantis
• Sand Grasshopper
Can you spot an insect here?
• Grasshopper
• Walking stick insect
Giant Millipedes
• African black
millipede
• 15 inches long
What are Arachnids?
• Ticks, Mites,
Scorpions & Spiders
• two body sections
• four pairs of legs
What is the world’s largest
spider?
• Goliath bird-eater Spider
• Eats mainly insect but will
also eat lizards, bats and
birds
• 12 inches long
• Lives in South America
• Female will eat the male
after mating
How many eyes does a spider
have?
• Most have 8 eyes
• Some spiders have 6,
4, 2, 0 eyes
• But most spiders
have 8 eyes
How does spiders smell and
hear?
• Spiders smell and
hear with tiny hair on
its legs
What are some examples of
Echinoderm?
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Star Fish
Sea Urchin
Sea Cucumber
Sand Dollar
What are the characteristics of
Echinoderms?
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Echino = “Spiny”, Derm = “Skin”
Endoskeleton: Endo = inner, skeleton
Five part radial symmetry
Internal fluid system: Water vascular
system
Echinoderm’s Body
Echinoderms are more closely
related to humans than sponges
Starfish Larva
(Bilateral Symmetry)
Mature Starfish
(Radial Symmetry)
Starfish facts
• They can reproduce
sexually and asexually
• A sea-star arm can only
regenerate into a whole
new organism if some of
the central disk of the sea
star is part of the chopped
off arm.
• They don’t have a brain,
heart or blood
• They get their oxygen
through their tube feet
• They have a skeleton
Reflection
• Write 5 facts that you learned in the video