Video narration
Socho aapka body ek bahut bada city hai. Us city ke chhote-chhote ghar, ya bricks, jinko mila ke sab kuch banta hai—unhe hum cells kehte hain. Human cell, ya animal cell, human body ka basic structural aur functional unit hota hai, matlab body ka shape bhi banata hai aur kaam bhi karwata hai. Sabse bahar hota hai cell membrane. Ye ek flexible boundary hai jo decide karta hai kya andar aayega aur kya bahar jayega—jaise security gate. Membrane ke andar hota hai cytoplasm. Ye jelly jaisa medium hai jisme cell ke saare parts, yani organelles, “float” karte hain aur reactions hoti rehti hain. Cell ka control room hota hai nucleus. Nucleus ke andar DNA hota hai, jo instructions ki book hai: cell ko kaunsa protein banana hai, kaise grow karna hai, aur kab divide hona hai. Energy ke liye mitochondria hote hain—cell ke “powerhouses”. Ye food se energy release karke cell ko kaam karne layak banate hain. Protein banane ka kaam hota hai ribosomes ka. Ye chhote se factories hain jo nucleus ki instructions follow karke proteins banate hain. Proteins ko process aur pack karta hai Golgi apparatus, aur transport ke liye vesicles help karte hain—jaise courier packets. Waste aur old parts ko todne ke liye lysosomes hote hain, jo cleaning system ki tarah kaam karte hain. Toh yaad rakho: membrane boundary hai, cytoplasm workspace, nucleus boss, mitochondria energy, ribosomes protein, Golgi packing, lysosomes cleaning. Isi coordination se ek single cell life chalata hai—and crores of cells milke poora human body banate hain.