The excretory system is a vital system in the human body that is responsible for removing waste products and maintaining homeostasis. It includes the kidneys, bladder, and urinary tract.
The kidneys are the main organ of the excretory system. They are a pair of bean-shaped organs located in the upper abdominal cavity, behind the liver and stomach. The kidneys have several important functions, including filtering the blood to remove excess water, electrolytes, and waste products. They also help to regulate blood pressure and produce hormones that regulate red blood cell production and bone health.
Urine is produced in the kidneys and then travels through the ureters to the bladder. The bladder is a muscular sac that stores urine until it is ready to be expelled from the body. When the bladder is full, it sends a signal to the brain to let us know that it is time to go to the bathroom.
The urinary tract is the pathway that urine takes as it leaves the body. It includes the urethra, which is a tube that carries urine out of the body. In men, the urethra is located within the penis, while in women it is located between the clitoris and the vaginal opening.
Problems with the excretory system can lead to serious health issues. For example, kidney diseases can result in kidney failure, which can lead to the need for dialysis or a kidney transplant. Urinary tract infections can also be a serious problem, particularly for women, as they can lead to kidney infections if left untreated.
Overall, the excretory system is an essential part of the human body that plays a vital role in maintaining homeostasis and keeping us healthy. It is important to take care of our excretory system by drinking plenty of water, eating a healthy diet, and getting regular check-ups to ensure that it is functioning properly.
Kameron Fournillier
It is composed of connective tissue with elastic fibers. Each nephron has two parts- glomerulus and renal tubule. Sweat is a watery fluid that consists of metabolic wastes like water, sodium chloride, lactic acid, amino acids, urea, glucose, etc. Collecting Ducts: The collecting duct reabsorbs a large amount of water to concentrate the urine. This can even lead to death. Students will also learn about the main types of nephrons: cortical nephrons and medullary nephrons. This condition is known as haematuria.
Notes on Excretory System
Means excretion of nitrogenous waste mainly as uric acid. Henle's loops are very short and extend only a little into the medulla 4. Creatine, uric acid and potassium are secreted by this process, which are mixed with glomerular filtrate remained after selective reabsorption forming urine. The chapter deals with the Excretory System of the human body, the organs, and the process of excretion. Purines are present in the body and are natural substances. Certain invertebrates, like some molluscs eg Unio, Limnae, etc.
Revision Notes on Excretory Products and Their Elimination for NEET 2023
The muscles are also known as detrusor muscles muscles that has the action of expelling a substance. Ammonia is one of the most dangerous nitrogenous waste out of these. Kidneys are divided into three regions, namely renal cortex, renal medulla, and renal pelvis. Summary of events occurring in a nephron Materials transferred Nephron region Process involved Mechanism 1. The ureter, blood vessels, and nerves enter the kidneys through the hilum. This leads to the accumulation of harmful wastes in the body, which can even cause death. The revision notes covers all important formulas and concepts given in the chapter.
Excretory Systems
As a result, different parts of Henle's loop absorb differently. Its secretion is stimulated by a reduction of Na + level in tissue fluid 3. The filtrate then moves down into the loop of Henle, in which more water is reabsorbed. It is due to urochrome. By the metabolism of proteins, nitrogenous wastes like ammonia, urea, uric acid are formed. For example, contractile vacuole in paramecium, canal system in sponges, flame cells in Platyhelminthes, Malpighian tubules in insects, etc. The waste product is removed from the cells and sent to the bloodstream.
