The document summarizes the structure and function of the human kidney. It discusses how the kidney plays important roles in excretion, homeostasis, osmoregulation, and regulating salts, pH, and hormones in the body. It describes the gross and microscopic structure of the kidneys and nephrons. Key functions of the kidneys include filtering blood, selectively reabsorbing substances like water, glucose, and salts via active transport and passive absorption, and secreting other substances. The document provides details on excretion sources, urea formation, and the selective reabsorption process in the proximal convoluted tubule using both active and passive uptake mechanisms.

1. KIDNEY – STRUCTURE AND
FUNCTION
E-CLIP EIS Teaching – Learning Strategies / Procedures
Biology Secondary 5, duration 60 min.
Teacher: Mr.Wichai Likitponrak

2. LOOK AT THIS PICTURE!
What
is
this?

3. INTRODUCTION BY THIS VDO!!!
https://www.youtube.com/watch?v=KTU4_qlhkMw

4. KIDNEY – STRUCTURE AND FUNCTION
 Roles of the kidney
 Excretion
 homeostasis
 Osmoregulation
 regulation of salts in the body
 regulation of pH
 production of a hormone (EPO)
 Kidney functions
 filtration of blood
 selective reabsorption by
– active transport
– passive absorption
 secretion

5. 5

6. KIDNEY - STRUCTURE
Gross structure – what you can see with the naked eye
• Position of kidneys in the body
• External structure
• Internal structure
Histology – what you can see through the microscope
6

7. 7
Human kidney
ureter ,renal artery ,renal vein
attached here

9. cortex
medulla
Kidney nephron
name the
parts?

10. glomerulus
branch of renal
artery
Bowman’s
capsule
branch of
renal vein
loop
DCT PCT
collecting
duct
capillaries

11. 11

12. EXCRETION AND THE KIDNEYS
 Sources : Where do these come from?
 Water ingested drink and food / metabolic water
 Protein ingested food / tissue breakdown
 Glucose ingested food / glycogen / other compounds
 Urea deamination / urea cycle
 Uric acid metabolism of nucleotide bases
 Creatinine metabolism of creatine (creatine phosphate)
 Ammonia deamination
 Urea formation
 Processing in the kidneys
 Ultrafiltration
 Selective reabsorption
 Secretion
 Osmoregulation

13. SELECTIVE REABSORPTION
 Proximal convoluted tubule
 Returning substances to the blood
 Active uptake
 Requires energy
 Co-transport
 Passive uptake
 Endocytosis

15. The Kidneys
receive
20-25% of the total output of the heart
filter
170 000 cm3 filtrate a day
reclaim
1300 g of NaCl each day
180 g glucose each day
almost all the water (180 litres) that is filtered each day
produce
1200 to 2000 cm3 urine a day
expect to carry
out calculations
on these sorts
of figures

16. SUMMARY OF THE HUMAN KIDNEY

18. ASSIGNMENT:
 Worksheet
 Pages 6-8
 1.1, 1.2 and 1.3
Sent me back
in this class !!!