Living Environment Translated Arabic 2014 | Page 22

l. Endoplasmic reticulum- a series of channels that transport
materials into and out of the nucleus.
m. Lysosome- a “ suicide sac”- this organelle is responsible for
destroying defective cells.
n. Nucleolus- an organelle inside of the nucleus that produces
ribosomes
o. Cell wall- tough, rigid outer coverings that protect the plant
cell and give it shape. FOUND ONLY IN PLANT CELLS!
p. Chloroplasts- organelles in plant cells that contain
chlorophyll. ONLY IN PLANT CELLS!
q. Cytoskeleton- a network of microfibers and microfilaments
that give eukaryotic cells support and shape
r. Vacuole- storage areas in cells; very large in plants cells
s. Cell- the smallest unit of an organisms
t. Tissue- a group of cells that work together to perform a
specific function
u. Organ- a group of tissues that work together to perform a
specific function
v. Organ-System- ( System) – a group of organs that work
together to perform a specific function
w. Organism- a complete living thing
x. Unicellular- made up of only one cell
y. Multicellular- made up of more than one cell