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The Mighty Cell These tiny, microscopic things are pretty complex They need to be able to carry out all the life processes that we do, but on a microscopic level!
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Unicellular Organisms
Lets Start With Cells
• Anyone remember what cells are?• How about all those organelles that they
have?• …maybe we should review
The Mighty Cell
• These tiny, microscopic things are pretty complex
• They need to be able to carry out all the life processes that we do, but on a microscopic level!
The Mighty Cell
• Cells have specialized parts that carry out life functions in the same way that our organs do for us
• We call them…organelles!
• Its similar to our brain
• Regulates and controls all of the happenings inside of the cell
• Contains the DNA
The goo: Cytoplasm
• This is the goo that everything is suspended in• If things need to get transported, it goes
through the cytoplasm (Similar to our blood)
The Barrier; Cell Membrane
• Keeps the insides in and the outsides out• Similar function as our skin
The Structure; Cell wall• Similar to the membrane, except it is very
rigid and gives it a definite shape• Our skeletal system does kind of the same
thing• Cell wall also keeps insides in and outsides
out
The Food Factory; Chloroplast
• Not all cells have this• Uses energy from the sun and CO2 to make
food!• How awesome would it be if we had
chloroplasts in our skin?...Think about it…
The Packaging System: Endoplasmic Reticulum
• Can create proteins and gets them all ready to go where they need to be
• Surrounds the nucleus
The Assembly Worker: Ribosomes
• They make proteins• Proteins are essential for all life, with out
them we wouldn’t be here…
The Power House; Mitochondria
• Converts food into ENERGY!!
• ‘The Mighty Mitochondria’
• Kind of the opposite of the chloroplast
The Storage: Vacuole
• Acts as a storage place. Can store food or other materials
The Post Office; Golgi Apparatus
• Packages and labels materials for shipment
The Stomach; Lysosome
• Contains Digestive juices that will break down food
Ok, now that we know about cells…
• Lets talk about some single celled organisms!!
Unicellular Organisms
Bacteria DinoflagellatesDiatoms
Bacteria
• Lack a nucleus and other organelles!! OMG THEIR SO SIMPLE!
• 3 different shapes– Rod, spiral and round
• Reproduce Rapidly!
Bacteria Are Important
• Decay Bacteria– Feed on dead things– Recycles nutrients back to the environment– Lots of them found at the bottom of the ocean
Bacteria Are Important
• Blue-Green (Cyano)Bacteria– Important Producers– Maybe the first photosynthetic organisms EVER!– Can produce Reef-like structures called
stromatolites!
Diatoms• Float near the surface
usually (that’s where the light is after all!)
• Important marine producers
• Come in a wide variety of shapes
Diatoms
• Has a nucleus and other organelles
• Transparent cell wall lets light in
• Has 2 frustules that fit together• Spines and oil filled vacuoles
help keep the diatoms floating near the surface
Dinoflagellates
• Quite Different! They can MOVE!!– They have 2 flagella that help them do this
• An eye spot helps them move towards the light
• Some are also bioluminescent
Dinoflagellates
• They are photosynthetic, but they can also eat food!
• When a lot of them bloom they can cause red tides which can be dangerous for people and wild life
Photosynthesis
Microscope Review
• Scanning (red), focus with big knob• Low power (yellow), focus with big knob or
small knob• High power; SMALL KNOB ONLY!
Stations
• Groups of 5 will rotate from station to station• 1 station is for prepping a slide to look at
(pondwater)• You will have 4 minutes for each station• You will sketch what you see on a sheet
resembling this;
Diamtoms Dinoflagellates
Blue-green bacteria Pond water Critter
Ticket Out;
• Create a Concept map for the next chapter (5)• Include all the major topics and subtopics in
the map• Homework: – Read the next chapter and take notes– Use connecting words/phrases on your concept
map for each connection