chapter 4 section 3: looking inside cells. looking inside cells organelles = tiny structures found...
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Chapter 4Section 3: Looking Inside Cells
Looking Inside CellsOrganelles = tiny structures found inside of the cells. Think organs of the cell.
The Organelles of the CellCell WallONLY in plant cellsProvides protection and support for the cell.
Think Prison Walls.
The Organelles of the CellCell MembraneControls what enters and exits the cell.
Think prison guard of the cell.
The Organelles of the NucleusNucleusThe brain of the cell, the control center.Controls all the activities of the cell.
The Organelles of the NucleusNuclear MembraneProtects the nucleus
Think about the yolk of an egg and how there is a thin barrier that holds it together.
The Organelles of the NucleusChromosomesRod shapedContain thin strands called Chromatin.Chromatin has the genetic material = DNA
The Organelles of the NucleusNucleolusProduces ribosomes.
The Organelles of the CytoplasmCytoplasm is the region between the cell membrane and the nucleus.Cytoplasm is a thick, always moving liquid.
The Organelles of the CytoplasmMitochondriaFound in the cytoplasmRod shaped organellesProduce energyThe more active the cell, the more mitochondria they have.
The Organelles of the CytoplasmEndoplasmic ReticulumFound in the cytoplasmIs like a giant mazeCarries the proteins and other materials from one part of the cell to another.
The Organelles of the CytoplasmRibosomeSmall grain like bodies attached to the Endoplasmic Reticulum.Produce proteinsProteins are sent to the Golgi Bodies
The Organelles of the CytoplasmGolgi BodiesFlattened collections of sacs and tubes.Receive the proteins and other newly formed material from the endoplasmic reticulum.Mailroom of the cell.Release materials outside the cell.
The Organelles of the CytoplasmChloroplastsCapture energy from the sun. think solar panelsUse energy to create food. photosynthesisONLY in plant cells.
The Organelles of the CytoplasmVacuolesLarge water filled sacsStorage area of the cell.FoodMaterials NeededWaste products
Without water in the vacuoles, plants begin to wilt.
The Organelles of the CytoplasmLysosomesSmall round structuresBreak down food particles .Break down old cell parts so that they can be reused again.Have powerful chemicals that are contained by a membrane.
Bacterial CellsHas a cell wall and membrane.Does NOT have a nucleus.Contain ribosomes, but none of the other organelles found in plant or animal cells.
Prokaryotes vs. EukaryotesOrganisms that do not contain a nucleus.PROKARYOTESOrganisms that contain a nucleus.EUKARYOTES
Structure and Function in CellsDifferent cells perform different functions.Examples:Plants have root cells that are specialized to absorb water from the soil.Nerve cells are specialized to carry messages that enable the animal to respond to external and internal stimuli. They have long, threadlike projections that act something like telephone wires. These wires carry messages throughout your body. Red blood cells carry oxygen throughout the body. Their thin, flexible structure helps them squeeze through tiny blood vessels.
Levels of OrganizationMulti cellular organisms have four levels of organization.CellsTissuesOrgansOrgan SystemsSmallestBiggest
TissuesA group of similar cells that perform a specific function in an organism. specialized for functions such as absorbing materials, transporting materials, and support. Example:Bone tissue produce a hard, strong material that supports the body.
OrgansA structure in the body that is composed of different kinds of tissue. Example:Bones, which support the body, are hard and sturdy because of the tissues of which they are composed.
Organ SystemA group of organs that work together to perform a major function in the body. Example:The skeletal system functions to support the body and give it shape. The skeleton protects delicate internal organs such as the brain and lungs. The strength and hardness of bones enable the skeleton to perform the functions of support and protection. The structure and arrangement of bones give the body its shape.
The 5th LevelEvery organism interacts with other organisms and the environment in which it lives. Scientists add another level of organization: the population. Population = All the members of one species in a particular area.