Human Body Systems Vocabulary Crossword

a group of organs that excrete chemical waste
tiny, sac like structures of the lungs that are surrounded by capillaries where gas exchange takes place
a chemical that regulates body function
blood vessels that carry blood away from the heart
male organs that produce sperm and testerone
blood vessels that carry blood toward the heart
a flap of tissue that prevents the back flow of blood
the network of small blood vessels that allow oxygen and other substances to flow into tissues
body system that controls the body that includes the brain and spinal cord
a body system that consists of skeletal muscles and tendons
provides supports for the body and provides attachments for muscles
male and a female each have special organs for reproduction . organs in the male have different organs than female
a group of organs that take in and digest food, and eliminate solid waste
the body system consisting of the lungs and passageways that ead to the lungs
a group of glads that produce hormones and release them into the blood