20 terms

Cells and Tissue

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Cells
The smallest unit, or building block, of all living things.
Nucleus
The control center of the cell.
Plasma Membrane
A fragile, transparent barrier that contains the cell contents and separates them from the surrounding environment.
Nuclear Envelope
Bound the nucleus by a double membrane.
Nuclear Pore
Penetrate through the fused regions of the nuclear envelope.
Nucleoli
Sites where ribosomes are assembled.
Chromatin
DNA combined with protein and forms a loose network of bumpy threads.
Cytoplasm
Cellular material outside the nucleus and inside the plasma membrane.
Microvilli
Tiny finger like projections that greatly increase the cells surface area for absorptions so that the process occurs quicker.
Chromosomes
The chromatin threads coil and condense to form dense, rodlike bodies.
Tight Junctions
Bind cells together into leaks proof sheets that prevent substances from passing through the extracellular space between the cells.
Desmosomes
Anchoring junctions that prevent cells subjected to mechanical stress from being pulled apart.
Gap Junctions
Mainly to allow communication. Chemical molecules, can pass directly from one cell to another through them.
Cytosol
Semitransparent fluid that suspends the other elements.
Organelles
Them metabolic machinery of each cell.
Inclusions
Chemical substances that may or may not be present, depending on the specific cell type.
Mitochondria
Depicted as tiny threadlike or sausage shaped organelles, but in living cells they squirm, lengthen, and change shape almost continuously. They are the powerhouse of the cell.
Ribosomes
Tiny bilobed, dark bodies made of proteins and one variety of RNA.
Endoplasmic reticulum (RER and SER)
A system of fluid filled cisterns that coil and twist through the cytoplasm.
Transport Vesicles
Transports proteins made of ribosome through the cell.