Biology_Book 2 Sep 2024.pdf

,, r · 0 il._.ii CELL: STRUC TURE AND FUNCTIONS (2).ii·Uf!inRii·#U=M!i Introduction to the Cell, its Size...

,, r · 0 il._.ii CELL: STRUC TURE AND FUNCTIONS (2).ii·Uf!inRii·#U=M!i Introduction to the Cell, its Size, shapes and types 1' Story and Types of Microscopes Prokaryotic and Eukaryotic Cell Structure and Functions of Cell Organelles Structure of Plant and Animal Cell ;=m OU n-lmOi@m:JS Students will be able to: Differentiate between unicellular and multicellular organisms. Understand about different components of cells like cytoplasm, nucleus and their functions. Compare the components of cells, structure, location and functions. Compare the structure of plant & animal cells. 1. Introductio n Ever thought about what living organisms are composed of or rather what is it that makes us living beings? Here canesh introduction to Cell. The cell is the smallest structural unit of a living organism. So, everything that we can do is possible because of the 10 trillion cells present in our body. The number is hugulia course, the function performed by them is even bigger. A Cell is the structural and functional unit of life. It is called "the basic unit of life". Cytology: It is a branch of science that deals with the study of cells with their components and functions. -:f:- 2. Story of Microscop e A microscope is an optical instrument that is used to magnify small objects... kin the,,,,_ 9 It is not clear who discovered the first microscope but Zacharias Janssen (1585) 1s credited for ma microscope. Anton van Leeuwenhoek - used a microscope with one lens to observe bacteria. He was the first to observe bacteria. 2.1 Types of Microscope There are broadly three types of mlcroecopee: (a) Simple microscope, (b) Compound microscope, (c) Electron microscope  t I 11 ', l lW1 l 111/f MH I fl IM< l 111~J , t! Slr:;r ttMl~rotco,,.: It con1l1t1 of II tingle convex lent for m&gnlflcfttlon withe short focal length. gn ca on. ,oxto 1SX. hi h resolution nd (b) Compou Mlcroecope: An opttoat lnatrument that consist, of 1wo convex 141nsee of short focal length, 8nd g 11 known H a compound microscope M1gnlflc1tton: ox-,ooox n (c~ Et.ctron Mlcrotcope: ·A mlcroacope th&t uses electron beams to lllumlnate a specimen object 1 known m,croscope. 81 an electro i 2 M1gntflcatlon: ,00,000 times more than that of an ordinary compound microscope. Courit ·- - ld)u1tnlf