Cranial nerves

Olfactory
Optic
Oculomotor
Trochlear
Trigeminal
Abducens
Facial
Auditory
Glossopharyngeal
Vagus
Spinal Accessory
Hypoglossal

There's actually a whole page on Wikipedia for this: List of mnemonics for the cranial nerves. The most famous one is Oh, Oh, Oh, To Touch And Feel A Girl's Very Soft Hands.

But what the heck.

Obese orderly old transparent tall Americans fold abstract gentle vertical swollen hats
Omnipotent organized operational tainted tingly aubergines feel airborne grounded vacant sickly hands

I don't think I can beat the classics at this one.

Endochondral ossification

Endochondral ossification is a process that creates fetal bone tissue in mammals. There are zones, or types, of cartilage that can be seen at a microscopic level during this process:

reserve proliferation hypertrophy calcification ossification

Or:

Radioactive planets hush clean oboes.
Runny patterns hurl cyan oranges.
Righteous pillows hide colossal opportunities.

Better info is at Wikipedia.

Criteria used in naming muscles

Location Shape Size Direction (of fibers) Origin Number Action

limp shiny snakes drive orange nervous aardvarks
lazy sugary sheep dive onto nifty apples