28.1 Levels of Organization 2.1 Atoms, Ions, and Molecules Set up Cornell Notes on pg. 35 • Topic: 28.1 Levels of Organization • Essential Question(s): • Create a Flow Map sequencing the five levels of organization. Please add a colored picture for each. (p. 856) • Apply: What two organ systems must work together to bring oxygen to the body’s cells?
Main Idea • Specialized cells function together in tissues, organs, organ systems, and the whole organism. • Scientists have organized multicellular structures into five levels based on complexity
1) Cells: Organisms are made up of specialized cells that each have a particular structure that enables it to perform a specific task • Exs: • Red blood cell- delivers oxygen to all tissues • Nerve cell- provides a pathway for electrochemical • nerve impulses
cell tissue 2. Tissues are groups of similar cells working together to perform a specialized function
3. Organs are different types of tissues working together to perform a function • Exs: • Lungs • Heart • Stomach
4. Organ systems: two or more organs working together to perform a function • Perform the most complex activities in the body • Ex: Respiratory system- lungs, sinuses, nasal passage, pharynx, larynx
Organism: The organ systems make up the entire organism. For the organism to stay alive, all of the systems must interact and work together.
Levels of Organization Flow Map (p. 34 in INB) Organ Systems Organism Organs Cells Tissues • Example organ • Example organ • Example organ • Example Cell • Example Tissue • Human • Name of organ system Picture Picture Picture Picture Picture Use pg. 855-856 to help you.
Levels of Organization Flow Map Example Organ Systems Organism Organs Cells Tissues Ovaries Fallopian tubes Uterus Vagina Ovarian Epithelial Tissue Ovary cell Female Human Reproductive System Use pg. 855-856 to help you.