tvacha

tvacha (skin) shareer ka baahya aavaran hoti hai jise baahyatvacha (epidramis) bhi kehte hain. yeh veshtan pranaali ka sabse bada ang hai jo upakala ootakon ki kai paraton dvaara nirmit hoti hai aur antarnihit maansapeshiyon, asthiyon, asthibandh (ligaameint) aur anya aantarik angon ki raksha karti hai.

choonki yeh seedhe vaataavaran ke sampark me aati hai, isliye tvacha rogajanakon ke khilaaf shareer ki suraksha mein ek bahut hi mahatvapoorn bhoomika nibhaati hai. iske anya kaaryon me jaise taapaavarodhan (insuleshan), taapamaan viniyman, samvedna, vitaamin di ka sanshleshan aur vitaamin bi folet ka sanrakshan karti hai. buri tarah se kshatigrast tvacha nishaan ootak bana kar changa hone ki koshish karti hai. yeh aksar rangaheen aur varnaheen hota hai.

maanav me tvacha ka varn prajaati ke anusaar badalta hai aur tvacha ka prakaar shushk se lekar taileeya ho sakta hai.

inhein bhi dekhein