Cellular Organisation

Question 1

What are the levels of organisation in the human body?

Answer 1

Chemical → Cellular → Tissue → Organ → System → Organism

Question 2

What is the chemical level?

Answer 2

Atoms and molecules (building blocks of life)

Question 3

What is the cellular level?

Answer 3

Cells – smallest living units (e.g., muscle, nerve cells)

Question 4

What is the tissue level?

Answer 4

Groups of similar cells performing a function

Question 5

What is the organ/system level?

Answer 5

Organs = tissues combined; systems = organs working together