Introduce the macromolecules that make up living organisms. An instructive explains functional groups, dehydration and hydrolysis, and the four types of macromolecules. Video is the seventh in a series of 10.

Don't let protein whey you down. Video focuses on the importance and structure of proteins. It connects the four structures of proteins, the way they connect, and the chemical properties of r-groups. 

An informative video goes in depth about lipids, or fats. It describes the importance of cell membranes and hydrocarbon tails that contain the energy available for life. It also explains the construction of phospholipids and...

A video explains both positive and negative feedback loops including body temperature, ripening fruit, and diabetes. An accompanying worksheet helps organize scholar's notes. 

Explain the purpose and structure of carbohydrates with a scientific video that goes in depth about monosaccharides, disaccharides, oligosaccharides, and polysaccharides. It offers an explanation of how they grow and shrink through...

High school chemists concentrate on the formation of polymers through condensation reactions. A video also explains the process of breaking them down through hydrolysis.

Does cell size have something to do with magic? No, but their size has everything to do with geometry. The video explores an analysis of two cylinder's volumes, showing how surface area affects volume. Learners see how in biology,...

Water flow isn't solely based on gravity. Pupils explore the formula for the potential of water through a measurement of psi based on the solute potential and the pressure potential. The lesson analyzes the example of placing salt...

How in the world is a musk oxen like a phospholipid? Learners see the fluid mosaic model and all of its complex parts: phospholipids, proteins, glycoproteins, glycolipids, and cholesterol. The video then focuses on the phospholipid's and...

Scholars briefly review meiosis and then apply these steps, through visuals, to Sordaria, a fungus that can be grown in class to support meiosis. The lesson emphasizes the importance of crossing over in meiosis and shows how to...

Signal transduction pathways are like the strings of Jimi Hendrix guitar being plucked and amplified! The video begins with an animation of a specific signal transduction pathway, detailing how epinephrine affects liver cells to release...

View how autotrophs and heterotrophs use the energy of the sun to form the energy their cells need, ATP. Learners watch an informative video that details the processes of photosynthesis, learning where it occurs, what...

Don't you wish you could absorb knowledge through osmosis? The video begins by defining osmosis, explores how water flows from a hypotonic to a hypertonic concentration, reaching an isotonic level. Learners then see a demonstration of...

You slough off all your skin cells once every seven years. Thank goodness for mitosis, or we would all be looking pretty strange without skin. The video begins by reviewing the cell cycle, looks at an overview of cells undergoing...

Although we cannot clone ourselves yet, our bodies make copies of our cells every day. The video begins by defining diploid and haploid. Learners see the cell cycle and begin to understand what happens in interphase before mitosis...

Identify the major players of meiosis, which are chromosomes from both mom and dad, sister chromatids, centrosomes, centrioles, and microtubules. The lesson goes on to explore each step of meiosis: interphase, prophase I and...

An informative video overviews haploid versus diploid cells, how meiosis, fertilization, and mitosis all work together, how mitosis and meiosis differ in their processes and end results, and concludes with a brief discussion about...

Humans have more interstitial fluid than blood, but what is interstitial fluid? The video allows learners to understand interstitial fluid by seeing it in a photo, learning its definition, showing where it comes from thanks to...

Hydrogen peroxide bubbles might look painful on a cut, but they are actually doing an important job. The video explores enzymes by allowing learners to see active sites on enzymes and how substrates, like a key fitting a lock, fit...

If life on Earth began as a prokaryote, how did eukaryotic cells arise? Learners explore the history of endosymbiosis from Dr. Lynn Margulis' first writings, which were not widely received to the evidence of mitochondrial DNA. They then...

Toxins, poisons, and diseases, oh my! These forces work throughout the body to disrupt the normal processes causing harm, or even death. Learners see how toxins, poisons such as anthrax, and diseases such as diabetes affect the normal...

Embryonic stems cells were only first discovered in 1998 — less than 20 years ago. The video explains what stem cells are (both pluripotent and totipotent), how they become specific types of tissues cells via internal cues such as the...

Energy from the sun travels millions of miles, and actually helps you move your thumb. Observe how reactions work together to release and consume energy, such as the power of a river grinding grains, which allows processes to occur....

ATP — it's everywhere! The video describes aerobic and anaerobic respiration, how the processes of glycolysis, the Kreb cycle, and the Electron Transport Chain work inside the cells to produce ATP, and ends with a discussion about...