small blood vessel that connects arteries to veins
large butterfly-shaped gland in the neck
organ which relays food to the stomach
blood-filtering organ in vertebrates
endocrine/digestive organ in vertebrates
An indented line that appears in the skin; as with age, or after being in the water, or on such animals as elephants.
Marks on the skin caused by exposure to sunlight: "Jim has brown hair, blue eyes and freckles."
unusual bodily growth
The felinoid that Kirk fought on Nimbus III had three breasts. Breast cancer represents an important health issue for Earth women.