Which type of muscle is termed as “voluntary?

Which animal has a higher percentage of slow-twitch muscle fibers?

Muscle contraction results in muscle fiber becoming _______.

A neuron has:

The brain is directly protected by the _________.

The central nervous system includes the _________.

Humans are considered ________.

The bones of the "hand" are called ________.

Which of the following is a function of the skeletal system?

The shoulder and hip joints are considered what kind of joints?