[Music] hi and welcome back to frees science lessons. co.uk by the end of this video you should be able to correctly label a diagram of an animal cell you should then be able to describe the functions of the different parts of an animal cell now before we start I should explain that we're going to be looking in much more detail at how cells work in later topics so this is really an introduction to the parts of animal cells I'm showing you here a picture of animal cells under a light microscope these are human cancer cells now as we said in previous videos animals are ukar their genetic material in other words their DNA is enclosed in a nucleus we can see the nucleus here so the function of the nucleus is to enclose the genetic material now I should point out that the nuclei of these cells have been stained blue normally nuclei are not that color inside the cell we've got the cyop pl that's a watery solution where chemical reactions take place and a good example of that is the first stage of respiration the whole cell is enclosed in a cell membrane and this controls the molecules that can enter and leave the cell now inside the cell we've got a number of smaller structures and you need to know about two of them these are the mitochondria and the ribosomes so let's look at those now now we cannot see either mitochondria or ribosomes on this picture and that's that's because they're too small these cells have been stained with the red dye to show the mitochondria now the mitochondria are where air robot respiration takes place and you do need to learn that we're going to be looking at respiration in more detail in later videos okay we're going to finish Now by looking at ribosomes now ribosomes are extremely small so we can't see them using a light microscope instead we need to use a much more powerful microscope called an electron microscope so this is an image using an electron microscope and we can see two mitochondria but if you look closely at these tiny flexs these are ribosomes now ribosomes are the SES of protein synthesis proteins are really important and they carry out lots of functions and cells for example enzymes now in the exam you could be asked to identify structures from a diagram of cell such as this one so pause the video now and try to identify the structures in the diagram Okay so we've got the nucleus the cytoplasm and the cell membrane we've also got mitochondria and finally ribosomes remember you'll find plenty of questions on the structure of animal cells in my vision workbook and you can get that by clicking on the link above okay so hopefully now you should be able to correctly label a diagram of an animal cell you should then be able to describe the functions of the different parts of an animal cell [Music]