EXCRETION MAIN IDEAS EXCRETION PROCESS THAT RIDS BODY
EXCRETION
MAIN IDEAS
EXCRETION • PROCESS THAT RIDS BODY OF METABOLIC WASTES: • PREFORMED BY: A) SKIN B) LIVER C) LUNGS D) KIDNEY E) INTESTINES
A) SKIN • PRIMARILY TO COOL BODY • PERSPIRATION INCLUDES: I) WATER II) SALT (K+, NA+, CA 2+, MG 2+, FE+) III) UREA
B) LIVER • EXCRETES: I) BILE (BREAKDOWN OF RBC) OF OF II) UROCHROME (BREAKDOWN HEME); GIVES YELLOW COLOR URINE
C) LUNGS • EXCRETES: I) CO 2 II) SOME H 2 O
D) KIDNEYS • EXCRETES NITROGENOUS WASTES: I) AMMONIA (NH 3) – DEAMINATION OF AMINO ACID TOXIC; THEREFORE CONVERTED TO UREA II) URIC ACID - NUCLEIC ACID BREAKDOWN III) CREATININE – FROM CREATININE PHOSPHATE IN MUSCLE METABOLISM
D) KIDNEYS • ALSO EXCRETES: I) IONS II) WATER III) DETOXIFIED DRUGS (PENICILLIN, HISTAMINES) URINE IS COMPOSED MAINLY OF UREA (~3%), SALTS (~2%), AND WATER (~95%)
E) INTESTINES • EXCRETES IRON AND CALCIUM SALTS VIA FECES
MAJOR ORGANS
Major Organs Kidney Renal Vein Renal artery Ureter Bladder Urethra
KIDNEY STRUCTURE
Kidney Renal Medulla Renal pelvis Renal Pyramid Video
TO DO’S • TABLE [RIGHT] • KIDNEY PRE-LAB • DICTIONARY
Substance Urea Uric Acid Creatine Water Salts (positive and negative ions) Bile Pigments Carbon Dioxide How it is Produced and From What Where it is Produced Excreted by Which Organ
- Slides: 15