Edexcel IGCSE Biology 复习笔记 2.9.3 The Urinary System
Edexcel IGCSE Biology 复习笔记 2.9.3 The Urinary System
The Urinary System: Structure
- Two key functions of the urinary system are:
- To filter waste products from the blood and expel it from the body as urine
- To control the water levels of the body (osmoregulation)
- The urinary system consists of two kidneys (found at the back of the abdomen) joined to the bladder by two tubes called the ureters
- Another tube, the urethra, carries urine from the bladder to outside the body
- Each kidney is also connected to:
- The renal artery which comes from the aorta and delivers oxygenated blood to the kidney
- The renal vein which delivers the deoxygenated blood from the kidney to the vena cava
The urinary system in humans
Main Structures of the Urinary System Table
Exam Tip
Note the difference between the ‘ureter’ and the ‘urethra’. These two names are commonly confused by students so take care to learn them and know which tube is which – they are NOT interchangeable!
转载自savemyexam
国际竞赛真题资料-点击免费领取！
早鸟钜惠！翰林2025暑期班课上线
美高学分项目重磅来袭！立即了解
