What is the primary function of the circulatory system?
The circulatory system transports nutrients, oxygen, and hormones to cells and removes waste products.
Which organ system is primarily responsible for gas exchange?
The respiratory system allows for the exchange of oxygen and carbon dioxide between the body and the environment.
Which structure is responsible for filtering blood in the human body?
The kidneys are vital for filtering blood, removing waste, and balancing fluids and electrolytes.
Which part of the nervous system is responsible for involuntary actions?
The autonomic nervous system controls involuntary actions such as heart rate and digestion.
Which of the following is NOT part of the digestive system?
The kidneys are not involved in digestion but are part of the excretory system.
How do muscles contract?
Muscle contraction occurs due to the sliding filament mechanism involving actin and myosin.
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Which part of the brain controls balance and coordination?
The cerebellum is responsible for maintaining balance and coordinating movement.
Which type of blood cells fight infections?
White blood cells (leukocytes) play a crucial role in defending the body against infection.
What is the primary function of the skeletal system?
The skeletal system provides structural support, protection for internal organs, and facilitates movement.