The Excretory System C15L3

Primary functions 1. the removal of wastes and foreign substances and excess substances from the blood 2. the temporary collection and storage of these substances 3. the elimination of these substances from the body 4. regulates the level of fluid in the body

The excretory system is made of four body systems.

Functions of the Excretory System (cont.) The digestive system collects and removes undigested solids from the foods you eat.

Functions of the Excretory System (cont.) The urinary system processes, transports, collects, and removes liquid waste from the body.

Functions of the Excretory System (cont.) The respiratory system removes carbon dioxide and water vapor from the body.

Functions of the Excretory System (cont.) The integumentary system, which includes the skin, secretes excess salt and water through sweat glands.

Organs of the urinary system Kidneys Ureters Bladder Urethra

Organs of the urinary system The organs of the urinary system work together to process, transport, collect and excrete liquid waste.

Organs of the urinary system The bean-shaped organ that filters, or removes, wastes from blood is the kidney. kidney The body has two kidneys, one on each side of the body, near the back wall of the abdomen, above the waste, and below the rib cage.

Kidney function filter wastes from the blood and excretes them in a liquid called urine

Kidney Blood flows into the kidney by way of the renal artery

Kidney nephron: a network of capillaries and small tubes, or tubules, in the kidneys, where filtration of blood occurs.

Nephron Your entire blood supply is filtered by your kidneys around 60 times each day.

main components of urine Urea Uric acid Water (95%) Sodium chloride

Abnormal Colors of Urine colorcause or disorder Dark brown but clearCirrhosis, acute viral hepatitis Greenishjaundice Milkyinfection producing pus

Abnormal Colors of Urine colorcause or disorder Pink, red, or lighter brown infection and hemorrhage in urinary system Dark yellow or orangeB complex or carotene; medication

Abnormal Components of Urine componentcause Glucosediabetes mellitus Proteinkidney disease or heart disease Acetonediabetes mellitus, starvation

Abnormal Components of Urine componentcause Amino Acid Crystalssevere liver disease Uric Acid Crystals gout

ureters Urine leaves each kidney through a tube called the ureter and goes to the urinary bladder

urinary bladder muscular bag that temporarily stores urine

urethra tube that leads from the bladder to the outside of the body

urethra Urine leaves the bladder through a tube called the urethra which contains circular muscles called sphincters that control the release of urine. urethra

Disorders and Diseases of the Urinary System

Urinary Disorders

KIDNEY FAILURE abnormal condition in which the kidneys fail to form urine. This disorder may be caused by physical injury, bacterial infections, or exposure to toxic chemicals

KIDNEY STONES

FLOATING KIDNEY (nephroptosis) a kidney that has been jarred from it usual location and has become movable; caused by a severe injury or blow to the lower back; can occur after a very overweight person reduces body fat

The excretory system helps maintain homeostasis by filtering wastes from the blood and removing wastes from the digestive system. The excretory system also interacts with the hypothalamus of the nervous system to help maintain homeostasis. The Excretory System and Homeostasis