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