COMMON CELL TRAITS A cell is the smallest unit that is capable of performing life functions.
COMPARING CELLS The size & shape of a cell relates to its function. (job it does)
Prokaryotic Cells (proh KAYR ee yah tihk) cells without membrane- bound structures Lack a NUCLEUS! EX: bacteria pond scum
Eukaryotic Cells (yew KAYR ee yah tihk) cells with membrane- bound structures EX: animals, plants, fungi and protists
Cell Parts Eukaryotic cells contain specialized structures called “organelles” or little organs.
protects the cell gives shape is made of cellulose A cell wall is found in plants, algae, fungi, & most bacteria. CELL WALL
CELL MEMBRANE Outer covering, protective layer around ALL cells For cells with cell walls,the cell membrane is inside the cell wall Allows food, oxygen, & water into the cell & waste products out of the cell.
CYTOPLASM gelatin-like inside cell membrane constantly flows Helps to keep organelles in place
CYTOSKELETON scaffolding-like structure in cytoplasm helps the cell maintain or change its shape made of protein Made of microtubules & microfilaments
NUCLEUS Directs all cell activities Contains instructions for everything the cell does These instructions are found on a hereditary material called DNA Usually the largest organelle
NUCLEAR MEMBRANE separates nucleus from cytoplasm controls movement of materials in & out of nucleus
NUCLEOLUS Aka “little nucleus” Found in the nucleus Ribosomes are made here!!
CHROMATIN contains genetic code that controls cell made of DNA & proteins