What is the function of the circulatory system?
The circulatory system transports nutrients, gases, hormones, and wastes throughout the body.
Which organ system controls body responses?
The nervous system uses electrical signals to quickly coordinate responses to stimuli.
Which structure is responsible for gas exchange in humans?
Alveoli in the lungs are tiny sacs where oxygen and carbon dioxide are exchanged with the blood.
Which nutrient is the main energy source for cells?
Glucose is a carbohydrate and the primary energy source used by most cells in the body.
Which system removes metabolic waste from the body?
The excretory system eliminates nitrogenous wastes through structures like kidneys and the urinary tract.
What is the function of the skeletal system?
The skeletal system provides structure, protection for internal organs, and works with muscles for movement.
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Which hormone regulates blood sugar?
Insulin is produced by the pancreas and helps regulate glucose levels in the blood.
Where does digestion begin in the human body?
Digestion begins in the mouth, where mechanical breakdown and enzymatic action start processing food.
What is homeostasis?
Homeostasis is the process of maintaining a stable internal environment within an organism.