Muscle does more than create movement
Skeletal muscle is active tissue that also influences metabolism, glucose use, balance, and resilience.
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Daily Human Body learning cards
Health, biology & performance. Explore a short explanation, an everyday example and a question you can answer from memory.
The Human Body collection currently has 8 written cards. The daily app introduces written ideas and revisits earlier cards once the collection is complete. Source previews offer additional reading.
Stability requires constant adjustment
Homeostasis maintains internal conditions within workable ranges.
Breathing creates an exchange surface
Oxygen and carbon dioxide diffuse across the thin alveolar-capillary barrier.
Cells need usable energy, not just fuel
ATP helps couple energy-releasing processes to cellular work.
A chemical message needs a receiver
Hormones act on target cells with suitable receptors.
Movement needs a connection
Tendons transmit force from muscle to bone.
Bone is living tissue
Bone is continually maintained through formation and resorption.
The body keeps time
Circadian rhythms organise many processes on an approximately 24-hour cycle.