Transcript radially symmetrical

Jellies: Day 1
By Larissa Ostlund
Lesson Objective:
To become familiar with:
• Jelly academic vocabulary
• Body parts and their functions
of jellies
• The basic understanding of
jellies
Where have I seen jellies
(jellyfish) before?
• Finding Nemo Video clip:
https://www.youtube.com/watch?v=maWVk
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(copy and paste into a new tab)
What are jellies?
• Jellies are
invertebrates
that dwell in the
sea
• Their bodies are
gelatinouslooking
• Aren’t fish
• They belong to
the Cnidaria
phylum
− Sea anemones
− corals
General Information about
Jellies: Radially symmetrical
Look at me! I’m
radially
symmetrical!
Radial symmetry: If you cut a
jelly on the center part of the
body, the halves would be the
same!
General Information: Swarms
A group of jellies
is called a swarm
Dory and Marlin were
stuck in a swarm of
jellies! (Just like the
man on the right)
How many species (types) are
there?
• There are about 1000-1500 species of
jellies
• The moon jelly is the most well known
species
Epidermis: The outer
body parts/cells
• Bell
• Tentacles
Bell
Bell
-creates
overall
movement
-makes the jelly
move up and
down; only
movement it can
control
-*In Finding Nemo
this is what Dory
and Marlin were
bouncing on
-protects the
-opens and closes
internal
like an umbrella
structures
Tentacles: contains stinging
cells that paralyze prey
Jellies stinging- ACTION!
Jellies have thousands of nematocysts on
the tentacles, oral (feeding) arms, and on
their mouth. Without them, they wouldn’t
be able to survive!
• How jellies sting with their tentacles:
https://www.youtube.com/watch?v=UoRWvE
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• Nematocysts firing (microscope view)
https://www.youtube.com/watch?v=6zJiBc_
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(copy and paste links in new tabs)
Gastrodermis: the inner
parts/cells
• Oral arms
• Mouth
• Digestive Cavity
Oral Arms
Mouth
-is where food
enters the body
(just like us)
-located
between the
oral arms
-unlike us, the
mouth serves
another
function: it also
gets rid of a
jelly’s waste
Digestive Cavity
Digestive Cavity
-AKA (the
colenteron)
-contains: stomach
and intestines
-where food is
digested (like
humans)
-digested food gives
jelly energy (like
humans)
Let’s Label our jelly!
-each elbow partner pair
will get a bag of
vocabulary words
-sort words and place
them on the boxes on
your worksheet
-be ready to share
answers
-we will complete it
together after sharing
out
Vocabulary match up!
• With your partner, put all of the cards face
down. Take turns matching the academic
vocabulary with their meaning.
Closure
• In your science notebooks:
• 1. sketch and write one thing you learned
• 2. write one part of the jelly that is similar
to the function of a body part of another
animal/human.
Subtitle Here
SECTION DIVIDER LAYOUT