Which three body systems work defensively against pathogens?

Which three body systems work defensively against pathogens?

• A. Integumentary, Immune, and Lymphatic
• B. Digestive, Respiratory, and Excretory
• C. Skeletal, Circulatory, and Nervous
• D. Endocrine, Muscular, and Reproductive

Answer: (A)

The three body systems that work defensively against pathogens are the integumentary, immune, and lymphatic systems. The integumentary system, which includes the skin, hair, nails, and various glands, provides the first line of defense against pathogens. The skin acts as a physical barrier, preventing harmful microorganisms from entering the body. Additionally, it produces antimicrobial substances and maintains a pH level that is unfavorable for many pathogens. The immune system is specifically designed to recognize and eliminate pathogens. It consists of various cells, tissues, and organs, such as white blood cells, antibodies, and the thymus. When pathogens invade, the immune system mounts a response that includes the recognition of invaders, the activation of immune cells, and the production of antibodies to neutralize or destroy the threats. The lymphatic system complements the immune system by transporting lymph, a fluid containing infection-fighting white blood cells, throughout the body. It also helps to remove waste products and transport fats from the digestive system. The lymphatic vessels and lymph nodes are crucial for filtering pathogens from the lymph and facilitating the activation of the immune response. Collectively, these three systems form an integrated defense network that protects the body from infections and diseases caused by various pathogens.

The three body systems that work defensively against pathogens are the integumentary, immune, and lymphatic systems.

The integumentary system, which includes the skin, hair, nails, and various glands, provides the first line of defense against pathogens. The skin acts as a physical barrier, preventing harmful microorganisms from entering the body. Additionally, it produces antimicrobial substances and maintains a pH level that is unfavorable for many pathogens.

The immune system is specifically designed to recognize and eliminate pathogens. It consists of various cells, tissues, and organs, such as white blood cells, antibodies, and the thymus. When pathogens invade, the immune system mounts a response that includes the recognition of invaders, the activation of immune cells, and the production of antibodies to neutralize or destroy the threats.

The lymphatic system complements the immune system by transporting lymph, a fluid containing infection-fighting white blood cells, throughout the body. It also helps to remove waste products and transport fats from the digestive system. The lymphatic vessels and lymph nodes are crucial for filtering pathogens from the lymph and facilitating the activation of the immune response.

Collectively, these three systems form an integrated defense network that protects the body from infections and diseases caused by various pathogens.