The circulatory, respiratory, and digestive systems are vital in the human body for transporting nutrients, oxygen, and removing waste products.
Circulatory system: The circulatory system in animals, including humans, transports oxygen and nutrients to tissues and removes waste products. It comprises the heart, blood, and blood vessels.
Respiratory system: This system in the human body is responsible for supplying oxygen to cells and removing carbon dioxide. It includes organs like the lungs and bronchi.
Digestive system: The digestive system processes food, extracts nutrients, and eliminates waste. Major components include the mouth, esophagus, stomach, and intestines.
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