2010 Urinary System- Igcse
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Homeostais. Excretion. Urinary System- Kidney structure and function. Nephron structure and function. Kidney failure. Kidney stones. Dialysis. Kidney transplant. IES Pedro de Luna -zgz- fernando http://biodeluna.wordpress.com/
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Contraceptives are methods that prevent or reduce the chances of pregnancy during sex. Barrier methods like condoms, diaphragms, and cervical caps block sperm from entering the uterus. Hormonal methods include contraceptive pills and vaginal rings, which use hormones to stop ovulation. The contraceptive pill contains estrogen and progesterone to prevent fertilization. In vitro fertilization involves extracting eggs from a woman and fertilizing them with sperm in a lab before transferring the embryo to the uterus.
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The male reproductive system generates semen in the testicles, which is stored in the epididymis for several days. During ejaculation, semen is expelled through the vas deferens and seminal vesicle into the ejaculatory duct and urethra. The muscular movements of ejaculation propel the sperm forward and out of the body. The functions of the male reproductive system are to produce, maintain and transport sperm and semen, discharge sperm in the female reproductive tract, and produce male sex hormones like testosterone.
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Fertilization in humans occurs in the fallopian tubes within hours of sexual intercourse. Only one sperm out of hundreds of millions can fertilize the female egg. The sperm must swim through the fallopian tube to reach the egg, breaking through its coating with enzymes to penetrate and fertilize it. Once fertilized, the sperm tail detaches and the egg coating thickens to prevent other sperm from entering.
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Sexually transmitted diseases are illnesses that can be transmitted between humans through sexual contact. This includes AIDS, which is caused by the HIV virus and progressively weakens the immune system if untreated. Gonorrhea is another common STD caused by bacteria that infects warm, moist areas and often has few or no symptoms. While treatable with antibiotics, untreated STDs can lead to long-term health issues like infertility. Prevention involves proper condom use, testing, treatment if infected, and education to promote safe sexual practices.
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3. Urine travels from the kidneys through the ureters to the urinary bladder for temporary storage and then exits through the urethra.
Urinary And Excretion System
The urinary system works to excrete waste from the body, regulate water and electrolyte balance, and secrete hormones. It is made up of the kidneys, ureters, urinary bladder, and urethra. The kidneys filter the blood to remove wastes and produce urine. Urine is transported from the kidneys to the bladder via the ureters. It is stored in the bladder and exited from the body through the urethra. Diseases can occur if the urinary system is not functioning properly, such as urinary tract infections and kidney failure.
RENAL SYSTEM DISEASES and treatment involved
The renal/urinary system works to filter waste and toxins from the blood to produce urine. The main organs are the kidneys, ureters, bladder, and urethra. The kidneys filter the blood and produce urine through glomerular filtration, reabsorption, and secretion. Acute kidney failure occurs when the kidneys suddenly lose their ability to filter waste, potentially due to conditions that lower blood flow or directly damage the kidneys. Chronic kidney disease gradually reduces kidney function over time due to conditions like diabetes or high blood pressure. Treatment may include dialysis or kidney transplantation.
The excretory system
The excretory system eliminates wastes from the body through various organs. The lungs, skin, large intestine, liver, and urinary system all play roles in excretion. The kidneys are the primary excretory organs, filtering wastes from the blood and regulating fluid and electrolyte balance. Nephrons are the functional units of the kidney that filter blood to form urine, reabsorbing necessary substances while excreting waste.
The human kindney[1]
The kidney is a crucial organ that removes waste from the blood. There are two kidneys located in the back of the abdomen, each about 4-5 inches long. The kidneys contain millions of nephrons that filter the blood to remove toxins via the renal artery. A defect in the kidneys can lead to many complications as their role cannot be replaced by any other organ.
Acute renal failure
Renal failure occurs when the kidneys are unable to remove waste and regulate fluids and electrolytes. This leads to the accumulation of waste in the blood and disruption of other body functions. There are two main types - acute renal failure, which develops rapidly over hours to days, and chronic kidney disease, which progresses over months to years. The main symptoms include leg swelling, fatigue, vomiting and confusion. Treatment focuses on fluid balance, electrolyte control, and renal replacement therapy such as dialysis. Prognosis depends on age and treatment.
Muhammad Asif deliver lecture on the human-excretory_system
The kidneys filter waste from the blood to produce urine. They contain nephrons which remove waste and regulate water and electrolyte levels. The kidneys maintain homeostasis by filtering 20% of the blood and reabsorbing useful substances while removing waste in urine. Common kidney disorders include urinary tract infections caused by bacteria, which if untreated can lead to kidney damage, and kidney stones formed from mineral deposits that can cause pain and require medical intervention.
Human excretory system
The human excretory system removes waste from the body through organs like the lungs, skin, colon and kidneys. The kidneys play a key role by filtering the blood to remove urea and other toxins, regulating electrolyte and acid-base balance, and controlling blood pressure. Each kidney contains millions of nephrons, the functional units that filter blood via glomeruli and tubules to produce urine, which is then stored in the bladder and expelled via the urethra. The excretory system is vital for maintaining homeostasis by regulating water balance and removing metabolic waste.
4to 4 excretion
The excretory system removes waste from the body through various organs. The kidneys are the primary organs of excretion, removing nitrogenous wastes such as urea and excess water and salts. The kidneys contain nephrons, which filter the blood to produce urine. Urine passes from the nephrons to the bladder through the ureters for storage and later excretion through the urethra. Homeostasis is maintained as the kidneys regulate water balance and the concentration of substances in the blood and tissues.
Presentation 9
The urinary system includes the kidneys, bladder, and ureters. The kidneys filter waste from the blood and produce urine, which is stored in the bladder and then excreted from the body via the urethra. The kidneys play a key role by filtering waste and regulating water and electrolyte levels in the blood. They must remove metabolic waste while maintaining the proper pH, volume, and ion concentrations in blood plasma. The kidneys also secrete hormones to help regulate blood pressure, red blood cell production, and calcium absorption.
Excretion: Chapter Content
The liver plays a key role in metabolism and homeostasis. It receives a dual blood supply and filters waste from the blood to produce urea, which is excreted. Excess alcohol is broken down but can overload the liver, causing fatty deposits. The kidneys filter blood to produce urine via nephrons and selective reabsorption maintains electrolyte balance. Kidney failure requires dialysis or transplant. Pregnancy and drug tests analyze samples for target hormones or compounds.
Excretory System
The document discusses the excretory system. It describes the major organs that are involved in excretion, including the lungs, skin, liver, and kidneys. The kidneys are described in more detail, noting their location and role in filtering the blood and producing urine. Urine contains waste products like urea, uric acid, and creatinine. The document also outlines other parts of the urinary system like the ureters, urinary bladder, and urethra. It discusses how the excretory system interacts with other body systems and concludes by covering two health issues - kidney stones and cystitis.
Excretion1
This document provides information on excretion in humans and other organisms. It discusses the key organs and processes involved in excretion in the human body, including the lungs, skin, and kidneys. In the kidneys, glomerular filtration occurs, along with reabsorption of useful substances and production of urine. The liver is described as having many functions including detoxification and producing urea from excess proteins. Excretion in plants, fish, and amoebas is also summarized, noting their various adaptations for osmoregulation.
Kidney failure
Renal failure occurs when the kidneys are no longer able to effectively remove waste and toxins from the blood. It can be acute, developing suddenly, or chronic, developing over a longer period of time. The main causes of acute renal failure are decreased blood flow to the kidneys, direct kidney damage, and blockages preventing urine outflow. Chronic renal failure is commonly caused by poorly controlled diabetes or hypertension and can develop over months or years. Treatment involves diet, medications, dialysis, and potentially kidney transplantation to replace failed kidney function.
Excretion 2015
The document summarizes key concepts about excretion and the urinary system. It discusses (1) how the kidneys produce urine through ultrafiltration and selective reabsorption, (2) how anti-diuretic hormone regulates water concentration in the blood through urine production, and (3) how dialysis can remove waste when the kidneys fail by diffusion across a semi-permeable membrane.
Excretory System
The document discusses the excretory system and its role in removing waste from the body. It describes the kidneys, ureters, urinary bladder, and urethra as key organs that filter blood, remove waste as urine, and store and expel urine from the body. The kidneys filter blood and regulate fluid and electrolyte balance while the ureters carry urine from the kidneys to the bladder for storage until urination through the urethra.
Lp 16 urinary system & urinalysis 2008
The document provides information on the urinary system and urinalysis. It describes the structures of the urinary system including the kidneys, ureters, bladder, and urethra. It then discusses the functions of the kidneys including production of urine, regulation of fluid balance and acid-base balance, and hormone production. Microscopic anatomy of the nephron is explained along with terms like osmosis, diffusion, reabsorption, and secretion. Physiology concepts such as urine concentration and regulation of volume are summarized. Finally, some common urinary conditions and what they indicate in urinalysis are briefly mentioned.
Urinary system
The urinary system consists of two kidneys, two ureters, one urinary bladder, and one urethra. The kidneys filter the blood and produce urine by regulating ions, volume, pH, and producing hormones. Urine passes from the kidneys to the bladder via the ureters. The bladder stores urine which is then expelled through the urethra. The functional unit of the kidney is the nephron, which filters blood and reabsorbs needed substances while secreting waste for urine production.
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