Cells- The Structure of Life Today we will be exploring different kinds of cells, and parts of cells.
2 Kinds of Cells• Prokaryotic – Less Complex – Missing a nucleus, and some other structures which Eukaryotic cells have• Eukaryotic – More Complex – Include a Nucleus
Plants and Animals- Different cells• Plant Cells • Animals Cells • Have rigid a Cell wall • No cell walls • Have • No choloroplasts Choloroplasts, which produce food.
Did you know?The parts within a cell are called “Organelles” Different organellesdo different thingsSome Parts of Eukaryotic Cells
Cell Membrane• The “bag” around the outside of a cell, holding everything inside • There are little holes in the bag to let certain things in and out • Lets the good things in, and keeps the bad things out.
Cytoplasm• The liquid within a cell – A special fluid which the organelles in a cell exist and interact in – Includes many molecules the cell needs to function – Also called cytosol
Cell wall• Only plant cells have a cell wall – The wall is made of cellulose and is rigid (hard) • “Cellulose provides a protected framework for a plant cell to survive. Its like taking a water balloon and putting it in a cardboard box. The balloon is protected from the outside world.” – Biology4kids.com
Ribosomes• Ribosomes help make proteins, which cells need to do all sorts of things. – They translate the code of DNA and use building blocks call amino acids to make proteins
Mitochondria• Mitochondria create energy for the cell. – Like your digestive system, mitochondria break down nutrients, which releases energy – The process of creating this energy is called cellular respiration
Choloroplasts• Only Plants (and some protists) have them! – They convert the energy of the sun in to sugar (which mitochondria break down later for energy) • You can see them in cells- they are always green – This process is called photosynthesis. Photosynthesis also releases oxygen.