The , shown at letter G in the figure, controls the size of the pupil.

Letter E on the figure indicates the .

Letter H in the figure indicates the , a transparent area on the front of the eye that lets light into the eye.

________ is a condition in which too little growth hormone is produced in childhood.

When a person develops antibodies that attack the thyroid gland, causing the thyroid to produce too many thyroid hormones, that person has ________.

Which of the following is the result of an excess in growth hormone in adults?

The clear, circular disk located just posterior to the iris that helps the eye focus is the , which is shown at letter F in the figure.

The , shown at letter H in the figure, contains hearing receptors, including the spiral organ.

The epidermis is indicated by the letter ________ in the figure of the skin.

The tough, outermost layer of the eye, indicated by the letter E in the figure, is the .