NGSS HS-LS1-2: Develop and use a model to illustrate the hierarchical organization of interacting systems that provide specific functions within multicellular organisms.
Select a level to explore how parts combine to form a more complex system.
Columnar epithelial cells with microvilli (brush border) on their apical surface to increase surface area.
Absorbs nutrients (water, sugars, peptides, lipids) from the lumen of the intestine into the bloodstream.
Millions of these specialized cells work together to form the epithelial tissue layer.
Drag the correct lower-level components into the drop zone to construct the current level.
Provides O₂
Removes CO₂
Provides Nutrients
(Glucose, Amino Acids)
Interaction: The Respiratory System brings in oxygen needed for cellular respiration. The Digestive System breaks down food into glucose and other nutrients. Both systems pass these resources to the Circulatory System, which delivers them to every cell in the organism so they can produce energy (ATP).