excretory system any system that eliminates wastes
TRANSCRIPT
Excretory System
Any system that eliminates wastes
Included in excretory system are:• Digestive-water and
undigested food out
• Respiratory- carbon dioxide and water out
• Skin-sweat and salts out
• Urinary-water, metabolic wastes and salts out
Urinary System: Function
• It filters your blood and removes wastes produced by your cells
• Fluid levels in the body are also maintained by the urinary system
Organs: Kidneys (2)• Filters all the blood in your body every 5
minutes
• Blood enters the kidney, then excess sugars, salts, and wastes are removed
• Purified blood is returned to the circulatory system
Cross-section of a human kidney
Organs: Ureter
• Water, salts, and other wastes flow from the kidneys to the bladder through the ureters.
Ureters
Organs: Bladder• Excess waste and water are stored in the
bladder
• About 1 L of urine is produced each day
Bladder
Organs: Urethra
• Water exits the body through a tube called the urethra
Urethra
Urinary System: Problems
• When kidneys don’t filter wastes, the body is slowly poisoned.
• High levels of glucose (sugar) can signal diabetes.
• Dialysis: a machine that can do the job of a broken or missing kidney. It will filter the blood.
Dialysis
Integumentary System Notes Notes
Functions of skin
• Protection– Cushions and insulates and is waterproof
– Protects from chemicals, heat, cold, bacteria
– Screens UV
• Synthesizes vitamin D with UV• Regulates body heat• Prevents unnecessary water loss• Sensory reception (nerve endings)
Disorders of the integumentary system
• Burns– Threat to life
• Catastrophic loss of body fluids• Dehydration and fatal circulatory shock• Infection
– Types• First degree – epidermis: redness (e.g. sunburn)• Second degree – epidermis and upper dermis: blister• Third degree - full thickness
• Infections• Skin cancer
BurnsFirst-degree(epidermis only; redness)
Second-degree(epidermis and dermis,with blistering)
Third-degree(full thickness, destroying epidermis, dermis, often part of hypodermis)
Review Quiz
Name the organsA
B
C
D
A-Kidney
B-Ureter
C-Bladder
D-Urethra
What system do kidneys work with?
• Circulatory System
What is done if kidneys don’t work properly?
• Blood is filtered in a dialysis machine