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Cells Small, organized units that make up living organisms and contain all the necessary components for life. ■ "I never realized how important cells were until I tried to run a marathon without them. Turns out, they're kind of like the power source of your body."
cancer A malignant growth of cells that can spread to other parts of the body, often leading to death. ■ I heard my grandma has cancer. I'm not sure how she's still alive after all this time.
hemoglobin A protein found in red blood cells that carries oxygen from the lungs to the rest of the body. ■ "I had a nightmare last night about my hemoglobin turning into a cartoonish superhero. It was hemo-tastic!"
Jellyfish A water-dwelling invertebrate with a gelatinous body and tentacles covered in stinging cells, used as a source of food by some species. ■ "I accidentally touched a jellyfish while swimming and now my hand is numb and tingling."
laboratories A place where scientists conduct experiments and make discoveries. ■ "I accidentally left my laptop in the lab last night. Now all of my files are labeled 'Human Embryonic Stem Cells'."
Lymph A clear, colorless fluid that flows through the body and carries white blood cells. ■ "I forgot my lymph at home today!
virus A tiny infectious agent that multiplies inside living cells and can cause diseases in plants and animals. ■ "I accidentally downloaded a virus on my computer, now it's running slower than a snail!
battery A device consisting of a group of cells, typically in a box or container, that produce electricity through chemical reactions. ■ I accidentally left my cell phone on the charger overnight and it exploded! Turns out, the "battery" was really just a time bomb waiting to go off.
cancers A disease characterized by the uncontrolled growth and spread of abnormal cells, often leading to the development of tumors. ■ "I'm sorry, but I can't go to the beach with you today - I have a bad case of sun cancer on my back."
Cardiovascular A system of blood vessels and organs that supply oxygen and nutrients to the body's cells, while removing waste products such as carbon dioxide. ■ "I need to work out more often if I want to keep my cardiovascular system in tip-top shape."
cuticle A thin layer of cells on the surface of the skin that protects it from infection and other harmful substances. ■ After forgetting to moisturize his hands, John's cuticle was so dry that he could barely touch anything without causing pain. He learned his lesson and now carries hand lotion with him wherever he goes.
Organism A being composed of one or more cells, capable of growth, reproduction, and response to its environment. ■ I once ate an organism that had a face, but it was just a figment of my imagination. I guess you could say it was a "face-plant"!
Organs A group of specialized cells working together to perform a specific function in the body, such as digestion or respiration. ■ "The liver is one of the most important organs in the body. It's responsible for filtering blood and processing nutrients, but it also has a secret talent for turning food into poison."
Retina A thin layer of tissue that lines the inner surface of the eye, containing photoreceptor cells that convert light into electrical signals which are transmitted to the brain. ■ "I had a bad case of dry eye last night, it felt like my retina was being burnt!
Spleen A small, pinkish-red organ located in the abdomen that removes red blood cells and filters out damaged or old blood. It also helps with digestion by producing bile. ■ "I had to take my spleen out last week because it was getting too big for my pants."
Tumor A large, swollen lump of malignant cells that often develops on the skin. ■ The tumor was so big, it looked like a giant, wrinkly potato growing on my arm. I had to wear long sleeves just to cover it up!
Viruses Small infectious agents that reproduce inside the cells of living organisms, often causing diseases. ■ "I'm telling you, my computer is running slower because it's infected with a virus. I bet if I install some antivirus software, it will be as fast as lightning!"