Verbs of the lower second conjugation are important for understanding Japanese grammar.

He lowered his head and greeted.

She is an exceptionally skilled female martial artist.

He is doing squats to train his quadriceps femoris muscle.

The tobi-kashira-mukade is a very rare creature.

He is doing squats to train his biceps femoris muscle.

He is training his triceps brachii muscle every day.

He goes to the gym every day to train his triceps surae muscle.

The splenius capitis muscle is a part of the neck muscles, helping to tilt the head backwards.

The semispinalis capitis muscle is a part of the neck muscles, helping to tilt the head backwards.