https://www.khanacademy.org/science/hs-bio/x230b3ff252126bb6:from-cells-to-organisms/x230b3ff252126bb6:human-body-systems/a/hs-the-immune-system-review 2024-09-19T19:08:55.413551339Z The immune system review Learn about the cells and functions of the immune system. article https://www.khanacademy.org/science/health-and-medicine/human-anatomy-and-physiology/integumentary-system-introduction/v/meet-the-skin 2023-08-17T23:33:36.770424498Z Meet the skin! (Overview) The integumentary system, including skin and appendages like nails and hair, serves as our body's largest organ. It's not just a barrier, but also an immune defender, a sensory conductor, and a thermoregulator. This system plays a crucial role in protecting us from external threats and maintaining our body's balance. Raja Narayan video https://cdn.kastatic.org/googleusercontent/mmeFwgeSQ7DdtcvPMGL2Y9bzQVbUhUExvSFR9PRKspEEVCEePcQTNJQ_wJ99xihD5sV9udeFj76dRFrHpW7eh1NZ Meet the skin! (Overview) The integumentary system, including skin and appendages like nails and hair, serves as our body's largest organ. It's not just a barrier, but also an immune defender, a sensory conductor, and a thermoregulator. This system plays a crucial role in protecting us from external threats and maintaining our body's balance. https://cdn.kastatic.org/ka-youtube-converted/4zKjzl0futI.mp4/4zKjzl0futI.mp4 316 First line of defense https://www.khanacademy.org/science/health-and-medicine/human-anatomy-and-physiology/integumentary-system-introduction/v/what-is-skin 2023-08-17T23:33:36.770424498Z What is skin? (Epidermis) Discover the intricate layers of the skin, from the topmost epidermis to the deepest hypodermis. Learn about the unique characteristics of each layer, including the role of keratinocytes, melanocytes, and the production of keratin. Uncover the mystery behind skin color and the importance of the skin's water-tight capabilities. Raja Narayan video https://cdn.kastatic.org/googleusercontent/Ip4HYGvko711SXGtCj_kpgTEuFhyQzRDNVfHX_PPxQDi9oejBdO0UrUrUiaTL4O74bVBfmZomm4fSrIqfXpjPfQF What is skin? (Epidermis) Discover the intricate layers of the skin, from the topmost epidermis to the deepest hypodermis. Learn about the unique characteristics of each layer, including the role of keratinocytes, melanocytes, and the production of keratin. Uncover the mystery behind skin color and the importance of the skin's water-tight capabilities. https://cdn.kastatic.org/ka-youtube-converted/TjYbFdSY0LA.mp4/TjYbFdSY0LA.mp4 668 First line of defense https://www.khanacademy.org/science/health-and-medicine/human-anatomy-and-physiology/integumentary-system-introduction/v/whats-in-sweat-holocrine-apocrine-and-merocrine-glands 2022-11-16T04:22:43.7414897Z What's in sweat? (Holocrine, Apocrine, Merocrine Glands) There are three types of sweat glands in the human body: holocrine, apocrine, and merocrine. Each type of gland has a different way of releasing secretions, is found in different parts of the body, and serves different functions. Functions of sweat glands include lubricating the skin, slowing bacterial growth, emotional sweating, and helping the body cool down. Raja Narayan video https://cdn.kastatic.org/googleusercontent/jidYZ4wRYvwRQc5TmWRQ7LH8FBUrVdYRj6IdoDGlCu53OudiYEbQQgbcl4nf6n84B_wFB1dlII_OingcakMwoA What's in sweat? (Holocrine, Apocrine, Merocrine Glands) There are three types of sweat glands in the human body: holocrine, apocrine, and merocrine. Each type of gland has a different way of releasing secretions, is found in different parts of the body, and serves different functions. Functions of sweat glands include lubricating the skin, slowing bacterial growth, emotional sweating, and helping the body cool down. https://cdn.kastatic.org/ka-youtube-converted/A44_Sqifi0U.mp4/A44_Sqifi0U.mp4 386 First line of defense