The Urinary System System Overview l Consists of
- Slides: 23
The Urinary System
System Overview l Consists of: l. Kidneys l. Ureters l. Urinary bladder l. Urethra
System Functions Removes certain salts and nitrogenous wastes from blood l Helps maintain normal concentrations of water and electrolytes within body fluids l Regulates the p. H and volume of body fluids l Helps control red blood cell (RBC) production and blood pressure l
Kidneys - Function l l l Remove substances from the blood Form urine Help regulate some metabolic processes by secreting hormones: l l Erythropoietin-RBC Renin-Blood Pressure
Kidneys - Location l l l Either side of the vertebral column In a depression on the posterior wall of the abdominal cavity Between 12 th thoracic and 3 rd lumbar vertebrae Left kidney is usually higher Behind the parietal peritoneum Held in place by CT and adipose
Kidney Structure l l Hilium Renal pelvis l l Calyces Renal papillae Renal medulla Renal cortex l Nephrons
Kidney Blood Supply l Renal arteries l l l From abdominal aorta Branches in kidney to form afferent arterioles Renal veins l Join the inferior vena cava
Nephron Structure l Renal corpuscle l l l Glomerulus Glomerular (Bowman’s) capsule Renal tubules l l Nephron loops (loop of Henle) Dump filtrate into collecting ducts calyces
Blood/Urine Pathways
Urine Formation l l Urine is a product of nephron activity. It is formed by 3 processes: 1. 2. 3. Glomerular filtration Tubular reabsorption Tubular secretion
Glomerular Filtration l l l Produces filtrate (mostly water) Pressure for filtration comes from blood pressure Filtrate is similar to blood plasma
Urine Composition l l Reflects the amounts of water and solutes that the kidneys must eliminate or retain to maintain homeostasis Contains urea, uric acid, electrolytes, traces of amino acids l l l Average urine volume 0. 6 -2. 5 L/day Volume depends on fluid intake, temperature, relative humidity, emotional state, respiratory rate, body temperature Abnormal components: l Glucose, proteins, hemoglobin, ketones, and blood cells
Urine Elimination l Nephron collecting ducts calyces renal pelvis ureter urinary bladder urethra outside of the body
Ureters l l About 25 cm long Extend from renal pelvis to the underside of the urinary bladder Muscular walls propel urine by peristalsis Flap-like fold acts as valve into the bladder
Urinary Bladder l l l Hollow, distensible, muscular organ Stores urine Forces urine into the urethra Behind the symphysis pubis Trigone
Bladder Stone Removal (Rough)
Bladder Stone Removal (Smooth)
Bladder Location in Females
Male and Female Bladder
Micturition l l l Aka urination Reflex triggered by stretching of the bladder: 1. Detrusor muscle contracts. 2. Abdominal wall and pelvic floor muscles contract. 3. Voluntary relaxation of external urethral sphincter Reflex center located in the spinal cord. Reflex accompanied by sense of urgency. Bladder holds 600 ml, but urge begins at 150 -300 ml.
Urethra l l l Tube that conveys urine from the bladder to the outside of the body Contains urethral glands that secrete mucus into the urethral canal Incontinence
Dialysis Treatment
- The urinary system consists of
- Lymphatic and urinary system
- Physiology of urine formation
- Figure 15-3 the urinary system
- Hyperproteinuria word parts
- Interesting facts about the integumentary system
- Urogenital papilla fetal pig
- Chapter 30 the urinary system workbook answers
- Kidney pyramid labeled
- Chapter 20 urinary/excretory system
- Urinary system model
- Urinary system fun fact
- Branching gills
- Urinary system powerpoint
- Proximal convoluted tubule histology
- Function of antidiuretic hormone
- Urinary system histology
- Abnormal constituents of urine
- Hysterosalpingography
- Defination of urine
- Excretory system
- Rat dissection
- Rat urinary system
- Vena cava urinary system