Bio - Excretory System

What is excretion?

removal of metabolic wastes

What is osmoregulation and why is it necessary?

It controls the water content of blood and how much is urinated. If this goes wrong cells can lyse (pop) or shrivel up.

what is excreted in the excretory system

CO2, Water, Urea, Ammonia, and Salts (Minerals)

organs of the excretory system

Lungs, Liver, Sweat Glands, and kidneys

Where is osmoregulation?

The medula of the kidney

What is filtered to make urine?

Blood is filtered

filtering unit of the kidneys?

The nephron is the tiny filtering unit

Bowmans Capsule

Double walled cup structure

Glomerus

cluster of blood capillaries

What does the glomerus do?

It filters blood

proximal convoluted tubule

most reabsorption and secretion

Loop of Henle

(in medulla) tubule empties filtrate into a collecting duct, water reabsorption

Distal Convoluted Tubule

Filtrate fine tuning

Collecting Duct

Final water reabsorption - controlled by ADH

What hormone controls the collecting duct?

ADH

Where is ADH from?

The pituitary gland

What does the kidney do?

produces urine

What do the ureters do?

Transports urine from kidneys to bladder

What does the bladder do?

Stores urine

Urethra

passes urine to outside

Kidney Stones cause

severe dehydration which causes buildup of minerals

Cirrhosis cause

excessive intake of alcohol

Cirrhosis effects

loss of liver cell function

Bladder Infection

infection of the urinary tract which causes a burning sensation when peeing

Dialysis

artificial filtration of blood

Distal Convoluted Tubule

Collecting Duct

Loop of Henle

Glomerus

Bowmans Capsule

Proximal Convoluted Tubule