Respiratory
Endocrine
Urinary/Reproductive
Musculoskeletal
100

The large air passages that lead from the windpipe to the lungs.

bronchi 

100

Endocrine gland that surrounds the trachea in the neck.

thyroid gland

100

The main function of this organ is to nourish the developing fetus prior to birth. "womb" 

uterus

100

each of the series of small bones forming the backbone

vertebra

200

The passage for air that moistens and warms it while it passes into the lungs, and protects the respiratory surface from an accumulation of foreign particles. "windpipe"

trachea

200

glands that produce parathyroid hormone, which plays a key role in the regulation of calcium levels in the blood.

parathyroid glands

200

glands in which the eggs form and the female hormones estrogen and progesterone are made. These hormones play an important role in female traits, such as breast development, body shape, and body hair.

ovaries

200

the juncture where bones and muscles come together, facilitating movement and stability

joint

300

tiny air sacs in your lungs that take up the oxygen you breathe in and keep your body going.

alveoli

300

glands that produce hormones that help regulate metabolism, immune system, blood pressure, response to stress and other essential functions.

adrenal glands

300

glands responsible for making sperm and are also involved in producing a hormone called testosterone.

Testes (testicles) 

300

fibrous connective tissue that attaches bone to bone, and usually serves to hold structures together and keep them stable.

ligament

400

Common passageway for food (from the mouth going to the esophagus) and air (from the nose to the trachea).  

pharynx 

400

Endocrine gland at the base of the brain that regulates many bodily functions through the hormones that it produces, including: Growth and sexual/reproductive development and function, other glands and organs (kidneys, uterus, and breasts). 

pituitary gland

400

Tube from the urinary bladder to the outside of the body.

urethra

400

 fibrous connective tissue that attaches muscle to bone

tendon

500

“Voice box”; located at the upper part of the trachea.

larynx

500

gland that receives information about the state of the light-dark cycle from the environment and conveys this information to produce and secrete the hormone melatonin.

 pineal gland

500

One of two tubes, each leading from a single kidney to the urinary bladder. 

ureter

500

Flexible connective tissue attached to bones at joints. For example, it surrounds the trachea and forms part of the external ear and nose.

cartilage