Excretory System
Gbogbo ọrọ náà
A stockman in Ilorin glances at the colour of a bull's urine before he checks anything else that morning: pale and free flowing means all is well, dark and scanty is an early warning. That quick habit rests on the excretory system, the kidneys, ureters, bladder and urethra that filter the blood and carry away what the body no longer needs.
In this lesson you will learn the four parts of the excretory system in the order urine actually travels, what the kidney does to blood as it passes through, and how urine is formed in three plain steps. You will also learn to tell urine and faeces apart properly, a distinction WAEC candidates lose marks on every year, and see why urine and dung together make manure one of the farmer's most valuable free resources.
Ebumnobi
- Define excretion
- Identify the parts of the excretory system
- State the functions of the kidney
- Explain the process of urine formation
- State the excretory products of a farm animal
Akọmọ Ojú-ẹkọ
Yi rajista ka ci gaba
Kpọpụta akaụntụ n’efu ka ị nweta ohere na ihe ọmụmụ niile, ajụjụ omume, ma soro mmepe gị.
Ayẹwo Ẹkọ
Ekele diri gi maka imecha ihe karịrị na Excretory System. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- Which of the following correctly gives the order in which urine passes through the excretory system? A. Bladder, ureter, kidney, urethra B. Kidney, ureter, bladder, urethra C. Kidney, bladder, ureter, urethra D. Ureter, kidney, urethra, bladder Answer: B
- The main nitrogenous waste product removed from the blood by the kidney is: A. Glucose B. Urea C. Water D. Carbon dioxide Answer: B
- The process by which useful substances filtered out of the blood are taken back into the blood in the kidney tubule is called: A. Filtration B. Egestion C. Reabsorption D. Excretion Answer: C
- Which of the following is correct about faeces? A. It is filtered from the blood by the kidney B. It is formed by excretion C. It is undigested food residue removed by egestion D. It leaves the body through the urethra Answer: C
- A farm animal producing scanty, dark urine on a hot day is most likely: A. Overfed B. Dehydrated C. Suffering from worms D. Constipated Answer: B
Yi rajista ka ci gaba
Kpọpụta akaụntụ n’efu ka ị nweta ohere na ihe ọmụmụ niile, ajụjụ omume, ma soro mmepe gị.
Yi rajista ka ci gaba
Kpọpụta akaụntụ n’efu ka ị nweta ohere na ihe ọmụmụ niile, ajụjụ omume, ma soro mmepe gị.
