Introduction to Introduction to Human Body SystemsHuman Body Systems

Circulatory systemCirculatory system

► Role: Transports Role: Transports substances substances throughout the throughout the bodybody

► Circulates oxygen, Circulates oxygen, CO2 heat, water, CO2 heat, water, nutrients, wastesnutrients, wastes

►Major organs: Heart, Major organs: Heart, Arteries, Veins Arteries, Veins

Excretory SystemExcretory System► Role: Filters wastes Role: Filters wastes

from blood; from blood; maintains bodies maintains bodies internal nutrient internal nutrient balancesbalances

► Also rids body of Also rids body of wastes via urethrawastes via urethra

►Major organs: Major organs: Kidneys, Urethra, Kidneys, Urethra, BladderBladder

Digestive SystemDigestive System► Role: Breaks down Role: Breaks down

macromolecules macromolecules and absorbs and absorbs necessary nutrientsnecessary nutrients

► Major organs: Major organs: Stomach, L.I., S.I.Stomach, L.I., S.I.

► Liver serves Liver serves multiple functions multiple functions for multiple for multiple systems (but is systems (but is considered part of considered part of DS)DS)

Reproductive SystemReproductive System

► Role: Producing Role: Producing offspring; regulating offspring; regulating sexual sexual characteristicscharacteristics

►Major organs: Major organs: Testes, Uterus, Testes, Uterus, OvariesOvaries

Skeletal SystemSkeletal System

► Provides body Provides body structure and supportstructure and support

► Bone marrow creates Bone marrow creates new blood cells for new blood cells for circulation;also stores circulation;also stores lipidslipids

►Major organs: bones, Major organs: bones, cartilagecartilage

Muscular SystemMuscular System

► Role: allows for Role: allows for movementmovement

►Major organs: Major organs: skeletal muscleskeletal muscle

Nervous SystemNervous System

► Control system of Control system of bodybody

►Major organs: Brain, Major organs: Brain, Spinal cord, nervesSpinal cord, nerves

► Stimulates heart Stimulates heart rate and controls rate and controls blood oxygen levelsblood oxygen levels

Integumentary SystemIntegumentary System

► Role: Protects body; Role: Protects body; transfer of heat; transfer of heat; sensory receptionsensory reception

►Major organs: skin, Major organs: skin, nailsnails

► Releases sweat, and Releases sweat, and heat from blood, to heat from blood, to help control body help control body temperature temperature

Endocrine SystemEndocrine System► Role: Circulates Role: Circulates

hormones around the hormones around the body to control body body to control body functions; maintains functions; maintains homeostasishomeostasis

►Major organs: Major organs: Pituitary, Thyroid, Pituitary, Thyroid, Adrenals, Adrenals, Pancreas,hypothalmuPancreas,hypothalmuss

Lymphatic SystemLymphatic System

► Role: Works to help Role: Works to help maintain ciculatory maintain ciculatory system as well as system as well as housing cells housing cells responsible for responsible for immunityimmunity

►Major organs: Major organs: Lymph nodesLymph nodes

Respiratory SystemRespiratory System

► Ventilation system Ventilation system for bodyfor body

►Major organs: lungs, Major organs: lungs, diaphragm, tracheadiaphragm, trachea

► Takes in oxygen Takes in oxygen and releases carbon and releases carbon dioxide from blooddioxide from blood