Human Excretion and Kidney Physiology

Dialysis works on the principle of osmosis, where solvent molecules move across a semipermeable membrane from a region of lower solute concentration to higher solute concentration. The dialysis membrane allows small molecules and waste products to pass through while retaining larger proteins and blood cells in the patient's blood.

 Kidney is Ophisthonephric in amphibians.

These are pea-sized structures located on the sides of the urethra . These glands produce transparent, slippery fluid which serves to lubricate the urethra and to neutralize the acidity present due to the drops of urine in the urethra.

Parkinsonism is a progressive disorder of the nervous system that affects movement, originating from the degeneration of neurons in the brain.

Glisson's capsule is the connective tissue sheath that covers the liver and extends into its interior to divide the parenchyma into lobules. It is a defining anatomical feature of the liver.

Uric acid is excreted as a semi-solid paste, which requires very little water. This is an evolutionary adaptation for birds to conserve body water, especially during embryonic development in eggs.

Glucose is filtered into the kidney tubules but is normally reabsorbed into the blood. The difference in concentration between blood entering and leaving the kidney is primarily due to the metabolic consumption of glucose by kidney cells to power active transport processes.

The liver is the primary metabolic organ responsible for detoxifying harmful substances, drugs, and metabolic waste products in the human body.

Single contractile vacuole is found in fresh water Amoeba. It appears like a bubble of clear, watery fluid, enclosed within a decicate and elastic condensation membrane resembling plasmalemma. its function is osmoregulation, i.e. excess amount of water collected in it an discharged out by it. The water collected in contractile vacuole contain trace of ammonia.

The proximal convoluted tube absorbs by active transport all the glucose and amino acids that are part of the original filtrate from the glomeruli. Also sodium, water, phosphate.

The glomerular filtrate contains a large amount of wate rand other dissolved substances such as urea, uric acid, creatinine, amino acids, glucose, sodium, potassium, vitamins etc. Glomerular filtrate and blood plasma are similar except that glomerular filtrate does not have proteins. 

Kidney of man is metanephros.The development of the kidney proceeds through a series of successive phases, each marked by the development of a more advanced kidney: the pronephros, mesonephros, and metanephros.The pronephros is the most immature form of kidney, while the metanephros is most developed. The metanephros persists as the definitive adult kidney.  

Nephrons are the functional units of the kidney. After filtration and processing, the final urine is collected and discharged into the collecting ducts, which then lead to the renal pelvis and ureter.

GFR stands for Glomerular Filtration Rate, which is the volume of fluid filtered from the renal glomerular capillaries into the Bowman's capsule per unit of time.

The liver is the primary site for the urea cycle, where toxic ammonia is converted into urea. The kidneys then filter this urea from the blood for excretion.