Hi Hi assalamualaikum warahmatullahi wabarakatuh meet again with me B Yuningsih this time we will discuss the material of class 11 which is about the definition of cells and the theory of cells pay close attention, okay? Try to see the difference in the picture below between tissue cells and organs if we look from the right side there is a respiratory system exam there is a beak organ then there is a tissue that makes up the beak and cells in the beak Oh so it turns out that cells are the smallest unit of living things well tissue is a collection of cells that have the same structure and function while organs are Hi a collection of tissues that have the same function Well we talk about the discoverer of cells yes you know 1665 Robert Hooke observed cork cells from the cell walls of dead plants using a simple microscope Robert Hooke saw a small empty space which was then called cells Ula in Latin means empty room we talk about cell theory yes the first career from Lamak this old word every living body is a collection of cells striden Squan stated that cells are the smallest structural unit of living things while max use stated that cells are the functional unit of cell theory next there is Rudolf virchow Hi who put forward om.new cellulase luley cells come from From the previous cell, there was Robert Brown who discovered the nucleus or cell nucleus and Er Trust Burger stated that the file is a unit of heredity. So that's the explanation about cells and cell theory. For the next video, we will talk about the differences between prokaryotic cells and eukaryotic cells. Wait for it. Don't forget to like and subscribe. Thank you. Wassalamu'alaikum warahmatullahi wabarakatuh.