The video tutorial explains the hierarchical structure of the human body, starting with cells as the basic building blocks. It describes how similar cells form tissues, which then combine to create organs. The video highlights the stomach as an example of an organ made of various tissues. It also introduces other vital organs like the heart and lungs. Finally, it explains how organs work together in organ systems, with a focus on the nervous system, which controls major body functions.

What are the basic building blocks of the human body?

• Tissues

• Cells

• Organs

• Systems

Which of the following is an example of tissue?

• Kidneys

• Nerve tissue

• Liver

• Heart

What is the primary function of the stomach?

• To filter waste

• To digest food

• To pump blood

• To exchange gases

Which organ is NOT mentioned as an important organ in the body?

• Heart

• Lungs

• Brain

• Liver

What is the main role of the nervous system?

• To digest food

• To support the body structure

• To circulate blood

• To receive and react to information