important vocabulary excretion: the process which metabolic wastes are eliminated to maintain...
TRANSCRIPT
THE EXCRETORY SYSTEM
Important Vocabulary
Excretion: The process which metabolic wastes are eliminated to maintain homeostasis.
Ureters: Transport urine from the kidneys to the urinary bladder
Urinary bladder: Store urine until it is released through the urethra
Urethra: Where urine is released
Excretory System’s Function Excretes metabolic wastes from the
body.
Structures of the Excretory System Skin Lungs Liver Kidney
Structures of the Excretory System Kidney: The major organ of
excretion. Excretes excess water, urea and metabolic wastes from the blood. Produce and excrete a waste product known as urine. Ureters transport urine from kidneys to the urinary bladder, where the urine is stored until it is released through the urethra.
Wastes enters through renal artery Exits through renal vein
Nephrons: Individual processing units of kidneys.
Maintain blood pH Regulate blood volume
The Kidneys and Homeostasis Kidneys play important role in maintaining
homeostasis The kidneys responds directly to the
composition of the blood. They are also influenced by the endocrine system. Disruption of proper kidney function can lead to serious health problems.
Kidney Disorders Kidney Stones Kidney Damage Kidney Failure
THE DIGESTIVE SYSTEM
Functions
Converts food into small molecules that can be used by the cell.
Food is processed by the digestive system in 4 phases.
4 Phases of the Digestive System 1) Ingestion- getting food into the
system through your mouth 2) Digestion- food is broken down 2
ways a) Mechanical- physical
breakdown of large pieces of foodb) Chemical- enzymes break
down food into the small molecules
3) Absorption- absorbed by cells in the small intestine
4) Elimination- travel through large intestine and eliminated from the body
Process/What Occurs
Food travels through the mouth, esophagus, stomach, and small intestine.
Process/What Occurs
Mouth/Teeth- perform mechanical digestion Saliva- moisten food, make it easier to chew,
begins process of chemical digestion Esophagus- a tube that leads food into the
stomach Stomach- muscular sac continues chemical and
mechanical digestion Small Intestine- chemical digestion and absorption
of the food Pancreas- gland that produces hormones that
regulate blood sugar levels, breaks down carbs, proteins, lipids, nucleic acids, produces sodium bicarbonate
Liver- produces bile, releases bile into small intestine, breaks down fats
Absorption & Elimination
Small Intestine- absorbs nutrients into lining of small intestine (carbs & protein)
Large Intestine- removes water from the undigested material left over
Feces removed from the body through the anus
THE END