Human Body Systems

Front

What is the endocrine system?

Back

The endocrine system is a network of glands that produce and secrete hormones, which are chemical messengers that regulate various functions in the body, including growth, metabolism, and mood.

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What is the function of the immune system?

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The immune system is the body's defense mechanism against pathogens, such as bacteria and viruses, helping to protect the body from infections and diseases.

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What does the excretory system do?

Back

The excretory system filters and removes liquid wastes from the body, primarily through the kidneys, bladder, and urethra.

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What is the role of the circulatory system?

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The circulatory system transports essential nutrients, gases, hormones, and wastes to and from cells throughout the body, using the heart, blood, and blood vessels.

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What is the purpose of the respiratory system?

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The respiratory system supplies the body with oxygen and removes carbon dioxide through the process of breathing, involving the lungs and airways.

Front

What are hormones?

Back

Hormones are chemical substances produced by glands in the endocrine system that regulate various physiological processes in the body.

Front

What organs are part of the immune system?

Back

Key organs of the immune system include the thymus, spleen, lymph nodes, and bone marrow, which work together to fight infections.

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How do the kidneys function in the excretory system?

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The kidneys filter blood to remove waste products and excess substances, producing urine that is stored in the bladder before being excreted.

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What is the heart's role in the circulatory system?

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The heart pumps blood throughout the body, supplying oxygen and nutrients to tissues and removing waste products.

Front

What is gas exchange in the respiratory system?

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Gas exchange is the process by which oxygen is taken into the body and carbon dioxide is expelled, occurring in the alveoli of the lungs.