16:43 - 19:32
2m 49s
Beakman explains wound healing by using a brick wall to simulate skin. When the skin is broken (hole is wall), then blood starts to come out (red and white balloons). Beakman then uses a short animation to explain red blood cells, white blood cells and platelets. Then the platelets start to fill up the hole in the wall and then tape is stretched across the opening to simulate fibrin. This entire demo shows how a scab works.
Video Transcript
Related Clips
Sophie explains how scabs form and how wounds are healed. She uses an analogy involving beavers building a dam to describe how the human body repairs skin.
Lester goes to see Nurse Phoebe for a burn, head injury and sprained ankle. She explains why using ice will help reduce pain and heal faster.
Beakman explains how leaves lose chlorophyll using a cartoon video. Then he explains the role of chlorophlyll in photosynthesis verbally. To further demonstrate, Beakman acts like the "chef" chlorophyll that provides food for the plant.
Hank explains in-depth the series of reactions that take place for a plant to produce food for itself, also known as photosynthesis. This video also explores the prerequisites (sunlight, carbon dioxide, and water) of these reactions.
Key Words: Xylem, Stomata, Chlorophyll, Chloroplast, Thylakoid, Photoexcitation, Photosystem II, Electron Transport Chain, Cytochrome Complex, ATP
By observing the chloroplasts in a leaf, the students learn that plants produce their own food and do not get it from another source. The students come to the conclusion that the chloroplasts use sunlight, air, and water to create sugar, which is used as energy for the plant.