veins
spinal column
stomach
rib cage
large intestines
testes
bladder
lungs
vagina
alveoli
capillaries
teeth
brain
trachea
ovaries
bronchial tubes
liver
nose and mouth
esophagus
nerves
arteries
uterus
kidneys
urethra
vas deferens
rectum
spinal cord
pancreas
heart
ureters
long bones
Fallopian tubes
penis
small intestine
respiratory - This tube connects the throat and nose to the bronchial tubes.
reproductive - Eggs develop in these.
excretory - These are tubes that urine passes though from the kidneys to the bladder.
digestive - This produces chemicals, such as digestive enzymes, that help digest food.
reproductive - Sperm are produced here.
circulatory - These blood vessels carry blood away from the heart.
nervous - These sense the outside world and communicate with the rest of the body's systems.
digestive - This holds solid waste before it is expelled from the body.
nervous - This signals the body to react to changes in the environment, such as danger or the smell of food.
reproductive - This is a tube-shaped passage from the uterus to the outside of the body.
excretory - urine is eliminated from the body through this tube.
skeletal - These provide support for the body and are where blood cells are produced.
excretory - These remove wastes from the blood and transfer them into urine.
nervous - This is a bundle of nerves that connects your brain to all the rest of your body.
reproductive - Sperm exit the body here.
digestive - These begin the process of mechanical digestion.
skeletal - These protect the spinal cord and support the head and back.
skeletal - This protects the lungs and supports breathing.
excretory - This holds urine before it is released from the body.
reproductive - Semen passes through these tubes from the testes to the urethra.
digestive - This absorbs water from food, stores wastes, and eventually eliminates wastes from the body.
digestive - This produces bile, which helps digest fats, breaks down toxins, and regulates cholesterol and sugar in the blood.
circulatory - These blood vessels carry blood toward the heart.
reproductive - In one of these tubes between the ovaries and uterus an egg is fertilized.
respiratory - Air passes through these just before it reaches the lungs.
circulatory - In these tiniest blood vessels blood and organs exchange nutrients and waste.
respiratory - Air enters the body here.
digestive - Nutrients are absorbed from food and go into the blood here.
reproductive - This pump works every minute of life.
respiratory - These are the tiny sacs where the exchange of oxygen and carbon dioxide takes place.
digestive - This stretchy muscular sac holds food.
reproductive - A fertilized egg grows here.
digestive - This moves food from the mouth into the stomach.
respiratory - These are where oxygen is exchanged between the blood and circulatory systems. These expand during inhalation and contract during exhalation.
