Excretion in humans and animals

In this topic

• What is excretion and why is it needed?
• Organs of excretion in humans
• How urine is made
• Skin, lungs and excretion in animals

Key terms

• Excretion
• Kidney
• Nephron
• Glomerulus
• Capsule
• Renal tubule
• Cortex
• Medulla
• Renal pelvis
• Primary urine
• Secondary urine
• Urea

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