The document discusses the anatomy and functions of the kidneys. It describes the kidneys' location behind the peritoneum and below the diaphragm. It also discusses the internal structures of the kidneys, including the renal pelvis and pyramids containing nephrons. The key functions of the kidneys are to form urine through processes of filtration, selective reabsorption of nutrients, and secretion of wastes. The kidneys regulate water balance and electrolyte levels like sodium through mechanisms involving hormones.
This was done as a Student presentation on the kidney.
Here following topics are covered.
Macroscopic structure of the urinary system
Microscopic anatomy of the urinary system
Functions of the nephron
Renal blood supply
Kidneys and blood pressure regulation
Structure of ureters and urinary bladder to perform its function
Renal failure
This was done as a Student presentation on the kidney.
Here following topics are covered.
Macroscopic structure of the urinary system
Microscopic anatomy of the urinary system
Functions of the nephron
Renal blood supply
Kidneys and blood pressure regulation
Structure of ureters and urinary bladder to perform its function
Renal failure
A detail on CSF
INTRODUCTION
PROPERTIES
COMPOSITION
FORMATION OF (CSF)
CSF is formed by choroid plexuses, situated with in the ventricles.
Choroid plexuses are tuft of capillaries present inside the ventricles.
A large amount of CSF is formed in the lateral ventricles.
SUBSTANCES AFFECTING THE FORMATION OF (CSF)
PILOCARPINE, extract of pituitary gland stimulate the secretion of CSF.
Injection of isotonic saline also stimulates CSF formation.
Injection of hypotonic saline increases CSF formation.
Hypertonic saline decreases CSF formation and CSF pressure.
ABSORPTION OF (CSF)
CSF is mostly by the archnoid villi into dural sinuses and spinal veins.
Small amount is absorbed along the perineural spaces into cervical lymphatics and into perivascular spaces.
Normally , about 500 mL of CSF is formed everyday and an equal amount is absorbed.
FUNCTIONS OF (CSF)
COLLECTION OF CSF
APPLIED PHYSIOLOGY
End-stage renal disease is a condition in which the kidneys no longer function normally and required excellent medical and nursing care for the managing this condition.
The nephron is the microscopic structural and functional unit of the kidney. It is composed of a renal corpuscle and a renal tubule. The renal corpuscle consists of a tuft of capillaries called a glomerulus and an encompassing Bowman's capsule. The renal tubule extends from the capsule.
A detail on CSF
INTRODUCTION
PROPERTIES
COMPOSITION
FORMATION OF (CSF)
CSF is formed by choroid plexuses, situated with in the ventricles.
Choroid plexuses are tuft of capillaries present inside the ventricles.
A large amount of CSF is formed in the lateral ventricles.
SUBSTANCES AFFECTING THE FORMATION OF (CSF)
PILOCARPINE, extract of pituitary gland stimulate the secretion of CSF.
Injection of isotonic saline also stimulates CSF formation.
Injection of hypotonic saline increases CSF formation.
Hypertonic saline decreases CSF formation and CSF pressure.
ABSORPTION OF (CSF)
CSF is mostly by the archnoid villi into dural sinuses and spinal veins.
Small amount is absorbed along the perineural spaces into cervical lymphatics and into perivascular spaces.
Normally , about 500 mL of CSF is formed everyday and an equal amount is absorbed.
FUNCTIONS OF (CSF)
COLLECTION OF CSF
APPLIED PHYSIOLOGY
End-stage renal disease is a condition in which the kidneys no longer function normally and required excellent medical and nursing care for the managing this condition.
The nephron is the microscopic structural and functional unit of the kidney. It is composed of a renal corpuscle and a renal tubule. The renal corpuscle consists of a tuft of capillaries called a glomerulus and an encompassing Bowman's capsule. The renal tubule extends from the capsule.
The genitourinary system, or urogenital system, are the organs of the reproductive system and the urinary system. These are grouped together because of their proximity to each other, their common embryological origin and the use of common pathways, like the male urethra.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
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2. INTRODUCTION
The kidneys lie on the posterior abdominal wall, one
on each side of the vertebral column, behind the
peritoneum and below the diaphragm. They extend
from the level of the 12th thoracic vertebra to the 3rd
lumbar vertebra, receiving some protection from the
lower rib cage. The right kidney is usually slightly
lower than the left, probably because of the
considerable space occupied by the liver.
4. Kidneys are bean-shaped organs, about 11 cm long, 6
cm wide, 3 cm thick and weigh 150 g.
ORGANS ASSOCIATED WITH THE KIDNEYS
Right kidney
1. superiorly – the right adrenal gland
2. interiorly – the right lobe of the liver, the duodenum .
3. posteriorly – the diaphragm, and muscles of the
posterior abdominal wall
5. left kidney
1. Superiorly – the left adrenal gland
2. interiorly – the spleen, stomach, pancreas, jejunum
and splenic flexure of the colon
3. posteriorly – the diaphragm and muscles of the
posterior abdominal wall Gross structure of the kidney
6.
7. The hilum is the concave medial border of the
kidney where the renal blood and lymph vessels,
the ureter and nerves enter.
The renal pelvis is the funnel – shaped that collect
urine formed by the kidney passes through a renal
papilla at the apex of a pyramid into a minor calyx,
then into a major calyx before passing through the
renal pelvis into the ureter.
It contains 18 pyramids and each pyramid contain
nephrons.
8. Microscopic structure of the
kidney
The kidney is composed of about 1–2 million
functional units, the nephrons, and a smaller number
of collecting ducts. The collecting ducts transport
urine through the pyramids to the calyces and renal
pelvis, . The collecting ducts are supported by a small
amount of connective tissue, containing blood vessels,
nerves and lymph vessels.
9. FUNCTION OF KIDNEY
FORMATION OF URIN
The kidneys form urine, which passes through the
ureters to the bladder for storage prior to excretion.
The composition of urine reflects exchange of
substances between the nephron and the blood in the
renal capillaries. Waste products of protein
metabolism are excreted, electrolyte levels are
controlled and pH (acid–base balance) is maintained
by excretion of hydrogen ions.
10. There are three processes involved
in the formation of urine:
Infiltration
Selective reabsorption
secretion
11. inFiltration
This takes place through the semipermeable walls of
the glomerulus and glomerular capsule. Water and
other small molecules pass through, although some
are reabsorbed later. Blood cells, plasma proteins and
other large molecules are too large to filter through
and therefore remain in the capillaries.
12. SELECTIVE REABSORPTION
Some ions, e.g. sodium and chloride, can be absorbed by
both active and passive mechanisms depending on the site
in the nephron.
Some constituents of glomerular filtrate (e.g. glucose,
amino acids) do not normally appear in urine because they
are completely reabsorbed unless blood levels are excessive.
Reabsorption of nitrogenous waste products, such as urea,
uric acid and creatinine is very limited.
14. WATER BALANCE AND URINE
OUTPUT
The source of most body water is dietary food and fluid,
and a small amount (called ‘metabolic water’) is formed by
metabolic processes. Water is excreted as the main
constituent of urine, in expired air, faeces and through the
skin as sweat. The amount lost in expired air and faeces is
fairly constant, and the amount of sweat produced is
associated with environmental and body temperatures .
15. The balance between fluid intake and output is
controlled by the kidneys. The minimum urinary
output, i.e. the smallest volume required to excrete
body waste products, is about 500 ml per day. Urinary
volume in excess of this is controlled mainly by
antidiuretic hormone (ADH) released into the blood
by the posterior lobe of the pituitary gland.
17. summary
As we seen before that the kidney is the importnt part
of the urinary system .and the functional part of
kidney is nephrons .infilteration , selective
reabsorption , and secretion is the one of the main
functions of kidneys.