In this video segment from An Introduction to the Living Cell, explore the inner workings of a cell, including some of its most important organelles. [3:47]

Video lesson provides an overview of animal and plant cells while covering cell walls, vacuoles, chloroplasts, peroxisomes, lysosomes, mitochondria, etc. [8:41]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

This video segment describes the critical role that mitochondria play in nearly every cellular process in your body.

Take a journey inside a leaf of a redwood tree! Enter the stoma and view the inside of a plant cell, translucent enough to capture light from the sun. Fly by familiar structures like the nucleus and mitochondria, and settle into the chloroplast to watch photosynthesis at work. [3:00] The video is followed by three different classroom ideas.

The Tree of Life is a multi-authored, Internet distributed project containing information about phylogeny and biodiversity. The Tree of Life can be used to locate information about a particular group of organisms through their taxonomy.