RESPIRATORY AND EXCRETORY SYSTEM REVIEW
Respiratory System – GAS EXCHANGE
- Nasal cavity: contains cilia and mucus FILTER and
MOISTEN air
- contains blood vessels to WARM the air
- Pharynx - throat
- Epiglottis – prevents food or fluid from entering the trachea
(prevents choking)
- Trachea – windpipe
- rings of cartilage
- cilia and mucus
- Bronchi
- Bronchioles
- Alveoli – where gas exchange occurs
- surrounded by CAPILLARIES
- oxygen diffuses into capillaries, carbon dioxide and water
diffuses out of capillaries
Breathing –
- Inhalation  diaphragm contracts (DOWN), rib cage
expands
- Exhalation  diaphragm relaxes (UP), rib cage relaxes
Excretion – removal of METABILC (cellular) WASTES
from body (carbon dioxide, water, salts, urea)
6. Excretory System
- Lungs – excrete carbon dioxide and water vapor
- Skin – excretes metabolic wastes in perspiration (water, salt, urea)
- regulates body temperature
- Liver – produced UREA
- Kidneys – filter metabolic wastes (water, salt, urea) from blood
- regulates the concentration of water in the blood
- produce URINE (water, salt, urea)
7. Urinary System –
- Kidneys – produce urine
- Ureters – transport urine to the bladder
- Urinary bladder – stores urine
- Urethra – releases urine from the bod
Skin
Lungs
Liver
Kidney
Kidney
Ureter
Urinary bladder
Urethra