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

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

Burns First-degree (epidermis only; redness) Second-degree (epidermis and dermis, with blistering) Third-degree (full thickness, destroying epidermis, dermis, often part of hypodermis)

Review Movie

Review Quiz

Name the organs A 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