Tag «natgeo»

Lungs 101 | National Geographic

– [Narrator] Breathe in, breathe out. With every breath, the body is replenished and cleansed. A process made possible by two of the body’s most important and delicate organs. The lungs are two major components of the respiratory system. Soft, light, and elastic, these organs are prime for taking in and filling up with air. …

Wildfires 101 | National Geographic

Wildfires 101 | National Geographic

– [Narrator] On average, wildfires burn up to five million acres of land in the United States each year. While they can start naturally, wildfires are often caused by humans with devastating consequences. Wildfires are large, uncontrolled infernos that burn and quickly spread through wild landscapes. Types of wildfires may include forest, brush, and peatland …

Heart 101 | National Geographic

– [Narrator] The heart pumps blood throughout the body. Carrying oxygen and nutrients to every cell. It’s this circulation of blood that is vital to sustaining life. The heart is an organ made up of several tough layers of muscle. The pericardium is the thin layer that covers the exterior while the endocardium lines the …

Cancer 101 | National Geographic

Cancer 101 | National Geographic

– [Narrator] Today cancer causes one in every seven deaths worldwide. But how does cancer start, and what is being done to combat it? Our bodies contain trillions of highly specialized cells and each carries genes responsible for regulating cell growth and division. But when a genetic change disrupts this process cells begin to grow …

Coral Reefs 101 | National Geographic

Coral Reefs 101 | National Geographic

(gentle music) – [Narrator] Coral reefs, their bright, vivid colors can be seen in tropical ocean waters around the globe. Beyond their brilliant appearance lies a hidden significance. Coral are animals. Though they may look like colorful plants, coral are, in fact, made up of tiny animals called polyps. These invertebrates can range from the …

One Strange Rock – Trailer | National Geographic

One Strange Rock – Trailer | National Geographic

[suspenseful music] I am going to tell you about the most incredible place. And you know what? You’re walking on it. Our planet is literally bursting with life. [echo] [popping] [plunk] [rhythmic vibrations] There’s so much activity, and our planet is right in the middle of it. I really wish that everyone could see the …