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Visible light penetrates an object and is focused by glass lenses to form an image on the retina or on film.
uses electrons instead of light, the shorter wavelength of electrons gives greater resolution
Transmission Electron Microscope
focuses a bem of electrons through a specimen. Mainly used to study the internal structure of cells
Scanning Electron Microscope
focus a beam of electrons onto the surface of a specimen, providing images that look 3-D.
tiny structures that carry out functions necessary for the cell to stay alive
the aqueous part of the cytoplasm within which various particles and organelles are suspended
Lack Nucleus, Lack various internal structures bound with phospholipid membranes, Are Small, Have a simple structure, Include Bacteria and Archaea
Have Nucleus, Have internal membrane bound organelles, Are Larger, More Complex Structure.
a selective barrier that allows sufficient passage of oxygen, nutrients, and waste to service the volume of every cell
Contains DNA in Eukaryotes
encloses the nucleus, separating it from the cytoplasm
genetic material within the cell, formed by DNA and proteins
located within the nucleus and is the site of ribosomal RAN (rRNA) synthesis
particles made of ribosomal RNA and protein
an internal membrane system in which components of cell membrane and some proteins are constructed
with ribosomes studding its surface
The Transport system of the cell, that regulates protein traffic and metabolic functions
Modifies products of the ER, Manufactures certain macromolecules, Sorts and Packages materials into transport vesicles.
a membranous sac of hydrolytic enzymes that can digest macromolecules
Storage for food and water
sits of cellular respiration, a metabolic process that generates ATP
sites of photosynthesis
inner membrane of mitochondria
membranous sacs, stacked to form grana
thylakoids that are stacked
a network of fibers that extends throughout the cytoplasm
hollow rods about 26 nm in diameter and about 200 nm to 25 microns long
hairlike locomotor appendage
tailike locomotor appendage
built as a twisted double chain of actin subunits
microfilaments that function in cellular motility use this protein.
a circular flow of cytoplasm within cells
an extracellular structure that distinguishes plant cells from animal cells
channels that perforate cell walls
here, membranes of neighboring cells are pressed together, preventing leakage of extracellular fluid.
fasten cells together into strong sheets
provide cytoplasmic channels between adjacent cells
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