![]() ![]() ![]() ![]() The nervous system, which consists of your brain, the spinal cord, and all the nerves throughout your body, controls movement, balance, the five senses, thought processes, and awareness.The muscular system facilitates movements of our bodies, from reaching for the remote control to smashing out an intense workout in the boxing ring.It keeps body fluid levels in balance and defends against infections. The lymphatic system is part of the immune system and complementary to the circulatory system.The integumentary system is the set of organs forming the outermost layer of your body, in other words: your skin! And it protects your soft and squishy interior from damage by external dirt, pathogens, and trauma.The immune system fights infection caused by pathogens, like bacteria and viruses.The endocrine system produces hormones that regulate metabolism, growth and development, tissue function, sexual reproduction, sleep, and mood.The digestive system takes in and processes food, and expels waste.The cardiovascular (or circulatory) system transports blood, oxygen, and nutrients throughout the body.The human body's 12 systems work together to ensure that we stay alive, healthy, and thrive: Let's go! 15 Basic human biology facts 1. So, if you want to understand yourself better, irrespective of where you're at in your education, this guide to the 15 human biology basics everyone should know will get you there! Human biology is staggeringly complex and yet it tells the story of how we function. Beneath our skin-and including our skin, our body's biggest organ-lies a wonderfully complex system of organs, bones, soft tissues, receptors, and blood vessels, every cell of which serves a function. ![]()
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