What is the outermost layer of the kidneys?

• glomerulus
• medulla
• pelvis
• cortex

What is the middle layer of the kidneys called?

• medulla
• pelvis
• cortex
• glomerulus

The lungs, kidney and skin are all part of the

• nervous system
• nephron
• kidney
• excretory system

The medulla, cortex and pelvis are all part of the

• nervous system
• nephron
• kidney
• excretory system

The Bowman's capsule, glomerulus, and collecting tubule are all part of the 

• nervous system
• kidney
• nephron
• excretory system

Which of the following mainly excretes CO₂?

• skin
• kidney
• lungs
• urethra

Which of the following mainly excretes water and heat?

• skin
• kidney
• lungs
• urethra

Which of the following mainly excretes nitrogenous waste, water and salts?

• skin
• kidney
• lungs
• gall bladder

The ________ is made up of a million ___________.

• kidney, ureters
• nephron, kidneys
• lungs, nephrons
• kidneys, nephrons

These organs are responsible for what?

• storing urine
• storing water
• filtering blood
• they don't have a particular job