Multicellular Organisms

Question 1

What are Multicellular Organisms built up from?

Answer 1

They are built up from multiple layers, which are organised into different levels:

• Cells
• Tissues
• Organs
• Organ Systems
• Organisms

Question 2

What are the Human Organ Systems?

Answer 2

• Nerve System (Brain, Nerves, Spinal cord)
• Skeletal System (Skulls, Ribcages, Jaws, Bones)
• Respiratory System (Lungs, Mouth, Windpipe)
• Circulatory System (Heart, Lungs, Veins, Arteries, Capillaries)
• Digestive System (Intestines, Liver, Windpipe, Mouth, Tongue, Teeth, Stomach, Kidneys)