The document provides an overview of the human excretory system, highlighting the role of the kidneys and nephron as crucial components. It details the nephron's functions in filtration, reabsorption, and secretion, leading to urine formation. Additionally, it includes assignments related to labeling structures and understanding their functions within the excretory system.

1. HUMAN EXCRETORY SYSTEM
ANNIE THAKUR
B.Ed 2nd year
P.T’s Roll No. 67105

2. BIOLOGICAL PROCESSES

3. HUMAN EXCRETORY SYSTEM

4. LOCATION OF KIDNEYS

5. L.S. KIDNEY

6. LABEL THE FOLLOWING
1.
2.
3.
4.

7. NEPHRON
 The structural and the functional unit of kidneys.
 Acts as a filtration unit of the kidney.
 Each kidney has a large no.s of these filtration units.

8. THE STRUCTURAL & THE FUNCTIONAL UNIT
Excretory System:
NEPHRON
Nervous System:
NEURON

10. WORKING OF NEPHRON: URINE
FORMATION
1.FILTRATION
2.
REABSORPTION
3.SECRETION

11. ACTIVITY: FILTRATION

12. URINE FORMATION:
 The water & impurities which are not dissolved are
sent to collecting duct. The filtrate contains more of
dissolved nitrogenous wastes i.e. urea and hence it
is termed as urine . From here the urine enters the
ureter and is collected in the urinary bladder.
NITROGENOUS
WASTE
UREA

13. FINAL RECAPITULATION
1. Name the given structure.
2. Position of the given structure…………….
3. Function of the given structure…………….

14. HOME ASSIGNMENT
1. Draw a well labelled diagram of a NEPHRON.
2. The kidneys in the human beings are a part of
the system for
a. Nutrition
b. Respiration
c. Excretion
d. Transportation
3. …………… is excreted out by kidneys.