Organelles are the different structures inside a cell. Cell membrane helps keep fluids and other organelles inside the cell; acts as a security guard. Cell wall is the outer layer... Organelles are the different structures inside a cell. Cell membrane helps keep fluids and other organelles inside the cell; acts as a security guard. Cell wall is the outer layer that keeps everything inside the cell protected. Cytoplasm is a fluid that fills the cell. Nucleus is the control center that controls growth and reproduction. Nucleolus is found inside the nucleus; made of RNA and protein. Chloroplast is where photosynthesis takes place and is only found in plant cells. Mitochondria are the powerhouses of the cell. Golgi apparatus turns combinations of molecules into new ones. Smooth endoplasmic reticulum is an organelle attached to the nucleus that's important in the creation and storage of lipids; it looks like tubes. Rough endoplasmic reticulum works with ribosomes attached to it to help with the synthesis and packing of proteins; looks like sheets of bumpy membranes attached to the nucleus. Vacuole is a storage bubble that stores food and nutrients the cell needs to survive. Ribosome are small organelles that build long chains of amino acids for the cell; also known as protein builders. Peroxisomes are organelles that digest nutrients and help break down toxic materials. Lysosomes help digest and break down food in the cell with the help of enzymes stored there. Microtubules help provide structure to the cell and also assist with cell division. Centrioles help the cell divide during mitosis and meiosis; made of multiple microtubules. Read more