Excretory Organs and the Urinary System (Grade 11 NSC Matric Life Sciences): Flashcards
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Excretion definition
Excretion definition
Removal of metabolic waste from an organism
Osmoregulation definition
Osmoregulation definition
Control of water levels in the body
Nephron definition
Nephron definition
Microscopic functional unit of the kidney
Four main kidney functions
Four main kidney functions
Osmoregulation, excretion, pH regulation, salt regulation
Three kidney regions
Three kidney regions
Cortex (outer), medulla (middle), pelvis (central)
Nephrons per kidney
Nephrons per kidney
Approximately 1 million
Malpighian body components
Malpighian body components
Glomerulus plus Bowman's capsule
Four urine formation processes
Four urine formation processes
Filtration, reabsorption, secretion, excretion
Blood pH maintained by kidneys
Blood pH maintained by kidneys
7.4
Water % reabsorbed in proximal tubule
Water % reabsorbed in proximal tubule
About 65%