Brain, spinal cord, peripheral nerves and sense organs; Recognizes and coordinates the body's response to stimuli from internal and external environments. Coordinates or moderates activities of other organ systems. Provides and interprets sensory information about extreme conditions
Skin, hair, nails, sweat glands, oil glands; Serves as a barrier against infection and injury, helps to regulate body temperature, provides protection against UV radiation from the sun and other environmental hazards. Provides sensory information.
Nose, sinuses, pharynx, larynx, trachea, bronchi, bronchioles, alveoli, lungs; Provides oxygen needed for cellular respiration to bloodstream and removes excess carbon dioxide from the bloodstream. Delivers air to alveoli (sites in lungs where gas exchange occurs). Produces sounds for communication.
Mouth (teeth, tongue), pharynx, esophagus, stomach, small intestine, large intenstine, rectum, liver, gallbladder, pancreas; Converts food into simpler molecules that can be used by the cells of the body (processes and absorbs nutrients from food) -- ions, water, & the breakdown products of dietary sugars, proteins, and fats; eliminates wastes;absorbs and conserves water; stores energy reserves.
Kidneys, ureters, urinary bladder, urethra. Excretes waste products from the blood and controls water balance by regulating volume of urine produced in ways that maintain homeostasis. Stores urine prior to voluntary elimination. Regulates blood ion concentrations and pH
Bones, cartilage, ligaments, tendons, bone marrow; Supports the body, protects internal organs, allows movement, stores calcium and other mineral reserves, provides a site for blood cell formation
Skeletal muscle and associated tendons, smooth muscle, cardiac muscle; Works with skeletal system to produce voluntary movement; provides protection and support for other tissues; generates heat that helps maintain body temperature; helps to circulate blood and move food through the digestive system
Cardiovascular (Circulatory) System
Heart, blood vessels, blood; Brings oxygen, nutrients, and hormones to cells, fights infection, removes cell wastes, helps to regulate body temperature by distributing heat. Distributes blood cells, water, and dissolved materials including nutrients, waste products, oxygen, and carbon dioxide.
Hypothalamus, pituitary, thyroid, parathyroids, adrenals, pancreas,gonads (ovaries/testes), endocrine tissues in other systems; Controls may structural and functional changes during growth, development, and metabolism. Maintains homeostasis. Directs long-term changes in the activities of other organ's systems. Adjusts metabolic activity and energy use by the body.
Reproductive System (male)
Testes, epididymis, vas deferens, urethra, scrotum, penis, seminal vescicles. Produces male sex cells (sperm), suspending fluids, and hormones. Sexual intercourse.
Reproductive System (female)
Ovaries, fallopian tubes, uterus, labia, clitoris, vagina, mammary glands; Produces reproductive cells (female sex cells - oocytes), nurtures and protects developing embryo in females from conception to delivery. Provides milk to nourish newborn infant. Sexual intercourse.
Lymphoid (Lymphatic/Immune Systems)
White blood cells, thymus, spleen, lymph nodes, lymph vessels, tonsils; Helps protect the body from infection and disease, collects fluid lost from blood vessels and returns the fluid to the circulatory system