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cell structure and function
cells structure and function
18
Anatomy
12th Grade
10/13/2009

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Term
cytoplasm
Definition
contains networks of membranes and organelles in a clear liquid
Term
organelles
Definition
"little organs". most enclosed by a selectively permeable membrane
Term
cytoskeleton
Definition
internal structural framework of cell
Term
endoplasmic reticulum
Definition
to support and distribute cytoplasm. transportation system for intracellular exchange of materials. surface area for chemical reactions.
Term
ribosomes
Definition
tiny granules composed of rRNA and protein. site of protein synthesis
Term
golgi apparatus
Definition
protein processing and packaging; specialized for secretion
Term
mitochondria
Definition
powerhouses of the cell. site of cell respiration. have own DNA
Term
lysosomes
Definition
membrane-bound sacs that contain powerful digestive enzymes. "suicide sacs" also function in extracellular digestion and degradation of nonuseful tissues
Term
peroxisomes
Definition
membranous sacs that contain enzymes for biochemical reactions, detoxification
Term
microtubules
Definition
important structural parts of the cytoskeleton, centrosome, cilia, flagellum
Term
centrosome
Definition
made up of centrioles. important role in moving chromosomes during cell division
Term
flagella and cilia
Definition
used for locomotion
Term
vesicles
Definition
membranous sacs
Term
nucleous
Definition
control center of cell
Term
nuclear envelope
Definition
double membrane. has nuclear pores, provide communication between nucleus and cytoplasm
Term
nucleoli
Definition
spherical bodies composed of protein and RNA
Term
chromatin
Definition
consists of DNA. during cell division, it coils and condenses into chromosomes
Term
cell membrane
Definition
thin but stable structure composed chiefly of a double layer of phospholipid molecules with proteins dispersed in it
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