18 November 2024

Ultrasound to look for veins


 Studying circulation becomes a bit more interesting when an ultrasound machine is used to scan for a vein so a cannula can be inserted into an arm. We also learned why needles are put into veins rather than arteries.

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“Why the Rate-Determining Step Is Not Always Obvious” A-Level Chemistry

  “Why the Rate-Determining Step Is Not Always Obvious” A student sees a three-step mechanism and immediately chooses the slowest-looking s...