True: glands that produce hormones are part of the endocrine system, the nervous system detects and responds to sensory stimuli, the integumentary system is the 1st line of defense against pathogens like bacteria and viruses, lungs are organs of the respiratory system, sperm is produced in the male reproductive system, brain, spinal cord, neurons, nerves are organs of the nervous system, the circulatory system circulates, distributes, or transports material, hormones are considered chemical messengers, blood is filtered and urine is produced by the excretory system, the brain, spinal cord and nerves are the organs of the nervous system, gas exchange is the primary function of the respiratory system, the skeletal system supports and protects you, the digestive system breaks down and absorbs nutrients, False: the digestive system produces and eliminates urine, the endocrine system is the 1st line of defense, the integumentary system's main organs are glands, the endocrine sytem's main organ is the skin, the muscular system is responsible for breaking down food, the skin is the main organ of the muscular system, urine is produced by the ciruclatory system,

T/F Body System Structure and Function

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