The video introduces the concept of organ systems in the human body, explaining how cells form tissues, tissues form organs, and organs form systems. It covers the 11 major organ systems: circulatory, digestive, endocrine, excretory, integumentary, lymphatic/immune, muscular, nervous, reproductive, respiratory, and skeletal. Each system's function and components are briefly described, emphasizing their interdependence. The video concludes with an example of how these systems work together during physical activity.

What is the primary function of the circulatory system?

• To transport blood and nutrients throughout the body

• To produce hormones

• To protect the body from pathogens

• To break down food for nutrients

Which organ is primarily responsible for filtering waste from the blood in the excretory system?

• Heart

• Lungs

• Kidneys

• Liver

What is the main role of the integumentary system?

• To protect the body and regulate temperature

• To transport oxygen

• To produce digestive enzymes

• To regulate hormones

Which system includes the skin and helps in temperature regulation?

• Skeletal system

• Digestive system

• Integumentary system

• Lymphatic system

Which system is responsible for coordinating voluntary and involuntary actions?

• Respiratory system

• Endocrine system

• Nervous system

• Muscular system

What is the primary function of the respiratory system?

• To digest food

• To secrete hormones

• To intake oxygen and expel carbon dioxide

• To produce blood cells

What is the main function of the skeletal system?

• To produce hormones

• To support and protect organs

• To filter waste from the blood

• To transport nutrients