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, the skeletal system produces blood cells in the bone marrow, 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, pathogens include bacteria, viruses, parasites, hormones are considered chemical messengers, peristaltic contractions occur in the stomach, the immune system protects and defends against pathogens, blood is filtered and urine produced by the excretory/urinary system, the brain, spinal cord and nerves are the organs of the nervous system, False: gas exchange is a function of the circulatory system, the circulatory system is responsible for producing blood cells, the digestive system produces and eliminates urine, the lymphatic system filters blood to produce 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, pathogens are destroyed by the nervous system, the lymphatic system detects and responds to sensory information, 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, hormones are produced by the integumentary system, the skin is part of the immune system,

Body System Structure and Function

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