https://www.khanacademy.org/science/hs-bio/x230b3ff252126bb6:ecology-and-natural-systems/x230b3ff252126bb6:organization-of-natural-systems/v/welcome-to-high-school-biology 2023-06-26T23:51:43.901255901Z Welcome to high school biology Welcome to High School Biology! In this course, we will explore the beauty of life, from tiny cells to complex ecosystems. We'll explore organism structure, cellular energy, genetics, evolution, ecology, and more, sparking curiosity and fostering a lifelong love for biology—the study of life. Sal Khan video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Welcome to high school biology Welcome to High School Biology! In this course, we will explore the beauty of life, from tiny cells to complex ecosystems. We'll explore organism structure, cellular energy, genetics, evolution, ecology, and more, sparking curiosity and fostering a lifelong love for biology—the study of life. https://cdn.kastatic.org/ka-youtube-converted/HjA-SvvL2BQ.mp4/HjA-SvvL2BQ.mp4 129 Universal principles of life science https://www.khanacademy.org/science/ms-biology/x0c5bb03129646fd6:cells-and-organisms/x0c5bb03129646fd6:organization-in-the-human-body/v/ms-organization-in-the-human-body 2024-01-04T21:34:20.525650636Z Organization in the human body In multicellular organisms, the body is a system of multiple interacting subsystems. These subsystems are groups of cells that work together to form tissues, and organs that are specialized for particular body functions. Organs work together in organ systems to carry out specific functions for the organism. Khan Academy video https://cdn.kastatic.org/ka_thumbnails_cache/fb69b19b-ffe7-4fe2-b59b-305c66860185_1280_720_base.png Organization in the human body In multicellular organisms, the body is a system of multiple interacting subsystems. These subsystems are groups of cells that work together to form tissues, and organs that are specialized for particular body functions. Organs work together in organ systems to carry out specific functions for the organism. https://cdn.kastatic.org/ka-youtube-converted/YE2peDF4Zqg.mp4/YE2peDF4Zqg.mp4 254 Universal principles of life science https://www.khanacademy.org/science/ms-biology/x0c5bb03129646fd6:cells-and-organisms/x0c5bb03129646fd6:organization-in-the-human-body/a/organization-in-the-human-body 2026-02-20T10:10:42.353650543Z Organization in the human body Review your understanding of organization in the human body in this free article aligned to NGSS standards. article https://www.khanacademy.org/science/ms-biology/x0c5bb03129646fd6:cells-and-organisms/x0c5bb03129646fd6:organization-in-the-human-body/e/understand-organization-in-the-human-body 2026-04-03T18:30:01.793877038Z Understand: organization in the human body Check your understanding of organization in the human body in this set of free practice questions aligned to NGSS standards. Khan Academy exercise