3.1 Key Terms

cytoplasm

everything inside a cell; cytosol and organelles

plasma membrane

phospholipid bilayer that forms barrier between inside and outside of cells

vesicles

small sacs in cells that carry nutrients and supplies

cytoskeleton

filaments and fibers in cells that give them their shape

nucleus

the part of the cell that houses genetic information

ribosomes

organelles that synthesize proteins

cytosol

the fluid that cells are full of

endoplasmic reticulum

connects to nucleus, makes lipids and proteins

Golgi apparatus

sorts and packages proteins and lipids for transport

lysosome

organelle that lyses (destroys) cellular waste

mitochondria

powerhouse of the cell, generates ATP

flagella

“tails” on sperm cells that help them move

cilia

tiny “feet” all around some cells to help them move or to move things across the cell’s surface

extracellular matrix

the structure that supports the body’s cells and tissues

interstitial fluid

liquid that surrounds your cells