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33 Cards in this Set

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Exercise 5: The Organization of Cells
-Lab Study C: Multicellular Organism (Purpose)
-Characterize the organization of plants cells in a wet mount Elodea
-Characterize animal cell organization in human cells
Exercise 5: The Organization of Cells
-Lab Study D: Unknowns (Purpose)
-Characterize morphological and behavioral traits of unknown microbes in a sample pond water
Group of specialized cells
Group of Tissue
Organ System
Group of Organ
Cell Wall
Rigid outer framework surrounding the cell. Gives cell a definite shape and support. (not found in animal cells)
Organized contents of the cell, exclusive of the cell wall
The protoplasm of cell, exclusive of the cell wall
Central Vacuole
Membrane bound sac within the cytoplasm that is filled with water and dissolved substances.
-Structure serves to store metabolic wastes
-Gives the cell support by means of turgor pressures
-Plant and animal cells have them, but animal vacuoles are smaller
Green, spherical organelles often seen moving within cytoplasm.
-carry pigment chlorophyll
-involved in photosythesis
Elodea Canadensis
(Plant Cell)
Other structures: cytoplasmic strands
Cytoplasmic Streaming (Cyclosis)
As the microscope heats up the cells, cytoplasm and chloroplasts may begin to move around the central vacuole.
Usually spherical, transparent organelle within the cytoplasm
-Controls cell metabolism and division
Epithelial Cells
Occur on the outside of animals and serve to protect the animals from
-water loss
-mechanical injury
-foreign invaders
-line interior cavities and ducts in animals
(similar to plant epidermal cells)
Cell Membrane
Boundary that separates the cell from its surroundings (in animals cells they have cell membrane not cell wall)
Cheek Cells
Prokaryotic Organization
Eukaryotic Cell
Clusters of cells
Cluster composed of a consistent and predictable number of colonies
Deriving food from other organism or their by-products
the thin, transparent layer of cytoplasm directly beneath the cell membrane
the granular cytoplasm containing the cell organelles
Contractile vacuoles
clear, spherical vesicles of varying sizes that gradually enlarge as they fill with excess water. Once you've located a vacuole, watch it fill and then empty its contents into surrounding environment. These vacuoles serve an excretory function for the amoeba.[amoeba]
Food vacuoles
Small, dark, irregularly shaped vesicles within the endoplasm. They contain undigested food particles [amoeba]
transparent spheres. In the Scenedesmus alga, it tends to occur at either end of the cell.
In the Scenedesmus alga, they are the transparent projections that occur on the two end cells
terrestrial green alga that grows on the north sides of trees
an aquatic green alga is common in aquaria, ponds and lakes
* form a large complex colony
* cytoplasmic connections between cells
Complex Colony
Approx. 500-50,000 cells that are permanently united, there are cytoplasmic connections between cells and some cells are specialized for reproduction.
Cytoplasmic Strands
Connections between adjacent cells
Daughter colonies
Smaller spheres within the larger colony.
-Produced asexually
-When large enough they will be discharged into surrounding environment.