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Human Body Systems 7.12 B Identify the main functions of the systems of the human organism, including the circulatory, respiratory, skeletal, muscular, digestive, excretory, reproductive, integumentary, nervous, and endocrine systems. Structure: What are the parts? Joints and bones Function: What is its job? body and its muscles, contains materials to make new blood cells. Skeletal System Structure: What are the parts? 3 types of muscle: skeletal, smooth, and cardiac; ligaments and tendons Function: What is its job? Allows the body to move when attached to bone, allows movement in internal organs such as the heart and intestines, provides strength, balance and warmth. Muscular System Structure: What are the parts? Mouth, esophagus, stomach, small and large intestines, anus Function: What is its job? Converts food into simpler substances for the body to absorb as nutrients, breakdown of food also provides energy for all body functions. Digestive System Structure: What are the parts? Includes heart, arteries (distribute to body) and veins (carry deoxygenated blood to heart) Function: What is its job? Circulates blood through the body, supplies cells with oxygen and nutrients, removes waste products. Circulatory Systems Structure: What are the parts? Airways such as trachea, lungs, and alveoli Function: What is its job? Supplies blood with oxygen in the lungs, and removes carbon dioxide. Respiratory System Structure: What are the parts? Kidneys, bladder Function: What is its job? Filters water and fluids from the blood while also collecting urine waste. Excretory Structure: What are the parts? Skin, hair, nails, and sweat glands Function: What is its job? Continuously receives communication with the external environment (temp, humidity) and protects body deeper tissues, excretes waste. Helps rid body of heat, synthesizes Vitamin D. Integumentary System Structure: What are the parts? Brain, spinal cord, and nerves. Function: What is its job? Sends immediate and specific info as electrical impulses, control center coordinating all actions and reactions work together and are the bodies 2 systems for control and communication. Nervous System Structure: What are the parts? Glands, hormones Function: What is its job? Sends signals in form of hormones to the body but more slowly than nervous system, controls growth, reproduction, and metabolism. Endocrine System Structure: What are the parts? Lymph nodes, tonsils, spleen Function: What is its job? Responds to pathogens and provides defense to the body’s systems from disease caused by viruses and bacteria. Immune System Structure: What are the parts? Females: Uterus, ovaries Males: Penis, testicles Function: What is its job? Allows humans to continue as a species by fertilizing a female ovum with a male sperm through sexual reproduction. Reproductive System