Introduction to Human Body Systems Circulatory system Role

Introduction to Human Body Systems

Circulatory system ► Role: Transports substances throughout the body ► Circulates oxygen, CO 2 heat, water, nutrients, wastes ► Major organs: Heart, Arteries, Veins

Excretory System ► Role: Filters wastes from blood; maintains bodies internal nutrient balances ► Also rids body of wastes via urethra ► Major organs: Kidneys, Urethra, Bladder

Digestive System ► Role: Breaks down macromolecules and absorbs necessary nutrients ► Major organs: Stomach, L. I. , S. I. ► Liver serves multiple functions for multiple systems (but is considered part of DS)

Reproductive System ► Role: Producing offspring; regulating sexual characteristics ► Major organs: Testes, Uterus, Ovaries

Skeletal System ► Provides body structure and support ► Bone marrow creates new blood cells for circulation; also stores lipids ► Major organs: bones, cartilage

Muscular System ► Role: allows for movement ► Major organs: skeletal muscle

Nervous System ► Control system of body ► Major organs: Brain, Spinal cord, nerves ► Stimulates heart rate and controls blood oxygen levels

Integumentary System ► Role: Protects body; transfer of heat; sensory reception ► Major nails organs: skin, ► Releases sweat, and heat from blood, to help control body temperature

Endocrine System ► Role: Circulates hormones around the body to control body functions; maintains homeostasis ► Major organs: Pituitary, Thyroid, Adrenals, Pancreas, hypothalmus

Lymphatic System ► Role: Works to help maintain ciculatory system as well as housing cells responsible for immunity ► Major nodes organs: Lymph

Respiratory System ► Ventilation body system for ► Major organs: lungs, diaphragm, trachea ► Takes in oxygen and releases carbon dioxide from blood