Excretory system full chapter Notes, Study notes of Biology

Excretory Products and Their Elimination (Human Excretion System) 🌿 Learn about the main excretory wastes like urea, carbon dioxide, excess water, salts, and bile pigments and how the body removes them through kidneys, lungs, skin, and liver. This easy biology explanation is perfect for Class 8, 9, 10 students, school notes, and exam preparation. 📚✨

Typology: Study notes

2025/2026

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af | y Pxoducts 4 theix Elio fa a , excaciony | thers ~, * “Type OF Nityogenous.- Waste. ¥ UBIC_OCid: Hl * Ammonia * Uyea: Highly Toxic = Less Toxic Least Toxic “Neds MOXIMUM- Less watey Least _Woaies | Wakes EF ‘Mararanisi wep Eg Reptiles. Biads t- €4-_Ag: Amphibians, __ mayine Fishes, __ Insect Spoils. a Insects. Bony. FiShes___Texyestuial_ amphibians — — —————____ _* “kianey, “Measvxements__ nero ae oe —Length= 10-12 ¢m “kidney Width = $7 em - _ Thickness: 2-3 cm: UBetey : ae: | Human_ “Ex ceiosy, system | rar a a ao er —| | | | vrinasy bladdes yetyeg a : I shone Ond Colour of kidney Bean Shape " Reddish birasin ae | Kidneys Gye Situated betP the levels OF Last Thowacic_ 4 Thitd tuts | Towards the centre of the innes concave Surface oF Kidney } is Q notch Called Hilum: 3 a Tnnex to hilum iS 4 byoad Funnel Shaped Space called Renal Pelu: } 1 Hi # # | # * | Zones Of kidney- 2 20nes —f ovter- Comtex Ss I Inney - Medulia: sp Hy it, The medulla iS divided into 4 Few Conical masses Called QS Medoliasy Pyxamids: fe i The Comtex extends in bet? the medollasy pysamids as~ Renal t COlomn Of beytint 4 h 1! i iH ee EE a rn SF cielitiabienaasial Q2=0 > SS Sa eer si i it ca Kidney has neasig one ition complies tobolay 4 SrIVCVOBeS Called Nephyons: 4 # || Functional nit oF kidney~ Nepbyon ae Ae 4 ack, (Fie rat anes (ad, iY Glomeyvlug Renol_tobules 4 re enn ces | ——___ Bowmans_Per__Logp of per —— a Capsule Heme Hy Fi Glomeyulus - tuft 0 F Capillasies foxmed by afferent axtenies. | ___ #]|Gowmons Copsuie- double_Walled cup_tike Stsuctuse- I] # | Molphigian body oy _—> Glomesulvs + BoLsmon's capsule Renal _Covpuscies | “| GHTOMRTUWS" as EFF exent Oateriole HH ¢ i i NAF eend ' a : —_____||Aastenie CT pct F Collecting Duct rt |] Bowmans >) | (WN = ee iu | Capsule - | | [ ‘| = —— Se A en vb) i J * Types af Nephyons: ee CO*tICal_ Nephyons: 7 xia -Med ullaxy Nephss PLOW 1S Shost extends __~ Lol_is_veay. Ring. SON | \IHle_ into medulla ] deeply into the medulla | as os +. yom | > Moyosity of > only_15.7--0F Ne phon |Nephtons (85%) oe ee ———— —— ———————————— PoP Sener np eeieeemeeeseere RT aT ag meen y Be eT ION AE RAAS — Renin. Angiotensinogen. Mdostersone SYBsery Funciioning. OF Raas when GER iS low, BP decweased k activate Hi F Segnere . ie? | —— —_——LRenio LIuAog\omemlax Cells Angiotensinogen teonveytANgialensiagen TI——|_Angiotensipioxen n # vasoconstziction ff Re_OF Aldo stesone ! Reabsosption at dif fexent _Auhiles _# PCT-_70- 80% Clectyolytes and wares i ACtively - Not, Glucose Amino acids , Passively Uxea.., FLOW-_Wyatey 4 electrolytes 5 minimum dbs? at ascending limb # DCT-_ Not, Water, HCOs™ 9. CONdi Honal_ weabsoxption: # CO - Wwdiey 4 Salts TUbdUIAT: Secvetion. at _diffesent tubules. | | # PCT- Ht KT, NAB. HOH ~ hg: & _# per- Ht, kt, NH3 # Cp- Wt kt | Counies cussent is, foamed by Henle's loop. 4 Vasa vec | Puxpose of Counters Cosseni mechandsm is to produce i | Concentyated Uvine 4 Gradient in Coontes coxseni. is mainly caused by Nac) Used.) Human hidney Can produce urine measly. times Concentant thon invial Friiesaie a4 4 | Pyocess of Mictusation | --—— _|] B¥inaxy bladder ___[etwectcbing of }———— gets. filles with {——} walis of — L_pxine p- = aug pe Mictbaation| Release _Lof osine | # “xine /day~ Site ~ # Galycosusia = S0cose_in_orine ||## PH of vsine - 6-0 _ # Ketonvxia - Keto! ne_bodies_in__- en 1a Doeal day - =25-90 gm___#Glycosuia_4 Kelondtis ae — # colour of oxine-Light Yetlats _oxine ok { | Excyetion_O+hes +han_kidney 48 by lungs- Cr (290 milmin) . Some watey. __|# by liver-_Bile (alongwith digestive Waste) i # Disosders. oF _Excuetony _sysiem ft by Sweat 9ldnds- Water. NOCl, Dyed Lactic Geid ata by Sebaceous: a Stevalt War. Hysedcarbon,- Sebvm __— | y ! = ee at # Glomey vl - Mephaitit Inflammation — Or avocneeli ota ; Kidney i # Renal - calculi - Stone OF Cyysiallised salts Coxalates) —- ft Renal Failuxe - kidney Falluye “it Uxemia'- USeq IN blood: ij | conta ction_Of Mus cles Of U' bladdes| + Relaxation of bxethyal_Sphincey | - indicative OF Diabetes Mellitus: —