Microglia are immune cells in the brain, playing a role in maintaining the health of the nervous system.

He chose a stable job, saying 'a bird in the hand is worth two in the bush.'

He always keeps in mind the phrase 'If one learns without thinking, it is a waste.'

The Steller's eider is a type of duck that breeds in the Arctic region.

He ended up spoiling the ship for a ha'p'orth of tar because he didn't pay back a small debt.

He is doing special exercises to strengthen the opponens digiti minimi muscle of his foot.

In this park, a tree called Kogatama-no-ki, an alternative spelling of Shourei-no-ki, is planted.

He is doing special exercises to strengthen his abductor digiti minimi.

The rectus capitis posterior minor muscle is a part of the neck muscles, and it helps tilt the head backwards.