CELL MODEL By Kaylee Dolloff, Green period
The cell membrane has small pores that are so small they keep unwanted materials out, but at the same time they're big enough to let in the things the cell does want.
The Nucleus was the first cell organelle to ever be discovered. The oldest drawing of the Nucleus goes way back to 1719, by Antonie van Leeuwenhoek.
The nuclear membrane consists of small holes, called Nuclear pores. After being created by the Nucleolus, ribosomes exit through these.
The part of the Cytoplasm where there aren't any membrane-bound organelles is the Cytosol. It makes up roughly 70% of the cell.
A Endoplasmic Reticulum with Ribosomes traveling on it is called a "Rough Endoplasmic Reticulum" (Rough ER for short). One without is called a "Smooth ER"
The space inside those "ruffles" on a Mitochondrion is called the matrix.
The word "Lysosome" comes from the Greek words lysis, meaning to separate, and soma, meaning body.
While the nucleus was the first cell organelle to be discovered, the Golgi apparatus was one of the first to actually be observed in detail. It was discovered by Camillo Golgi (the organelle's namesake) in 1898.
In plant cells, the Vacuole performs the same functions as Lysosomes in animal cells, but they also store things. They're like 2 organelles in one.
If the nucleolus screws up, it's bad news. Malfunction of the nucleolus can cause disease in humans. The nucleolus also takes up about 25% of volume in the nucleus.
Ribosomes are made of RNA and proteins called ribonucleoproteins.