the smallest unit that can perform all life processes.
cell
a phospholipid layer that covers a cell’s surface; acts as a barrier between the inside of a cell and the cell’s enviornment
cell membrane
one of the small bodies in a cell’s cytoplasm that are specialized to perform a specific function
organelle
in a eukarotic cell, a membrane-bound that contains the cell’s DNA and that has a role in processes such as growth, metabolism, and reproduction.
nucleus
an organism that consists of a single cell that does not have a nucleus
prokaryote
an organism made up of cells that have a nucleus enclosed by a membrane; eukaryotes include animals, plants , and fungi, but not archaebacteria or eubacteria
eukaryotes
a rigid structure that surrounds the cell membrane and provides support to the cell
cell wall
cell organelle composed of RNA and protein; the site of protein sysnthesis
ribosome
a system of membranes that is found in a cell’s cytoplasm and that assists in the production, processing, and transport of proteins and in the production of lipids
endoplasmic reticulum
in eukarotic cells, the cell organelle that is surrounded by two cell organelle that is surrounded by two membranes and that is the site of cellular respiration
mitochondrion
cell organelle that helps make and package meterials to be transported out of the cell
golgi complex
a small cavity or sac that contains materials in eukaryotic cell
vesicle
a cell organelle that contains digestive enzymes
lysosome
a group of similar cells that perform a common function
tissue
a collection of tissues that carry out a specialized function of the body
organ
a group of organs that work together to perform body functions
organ system
a living thing; anything that can carry out life processes independantly
organism
the arrangement of parts in an organism
stucture
the special, normal, or proper activity of an organ or part.
function