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How do you know where your hand is without looking?

You can usually tell whether your elbow is bent without watching it. Signals from muscles, tendons and joints help your nervous system track the body from the inside.

3–5 min

Questions you could explore

  • How does information about body position differ from touch or vision?
  • What different information do muscle, tendon, and joint sensors contribute to proprioception?

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Health and the body

Daylight and the body's clock

Internal daily rhythms respond to outside cues, with light helping coordinate the body's sense of time.

3–5 min

Daylight and the body's clock

Health and the body3–5 minInternal daily rhythms respond to outside cues, with light helping coordinate the body's sense of time.

Health and the body

How vaccines build immune memory

Vaccines make use of recognition and memory, though different vaccine types introduce the relevant information in different ways.

4–5 min

How vaccines build immune memory

Health and the body4–5 minVaccines make use of recognition and memory, though different vaccine types introduce the relevant information in different ways.

Antibiotics and the viruses they cannot treat

Health and the body2–3 minAn antibiotic that helps against certain bacteria has no matching target in the viruses that cause a cold.

How do you know where your hand is without looking? | Speech Topic | speaking.app