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Introduction to Humans: Our bodies are constantly functioning and performing duties that we do not realize every second of every minute. From the outside we seem simple with our two legs, one part body, endoskeleton, vertebrate appearance, and bilateral symmetry, but the complexities within each of our body parts when closely examined can help us identify each and every role of our systems. Our bodies ten have internal systems but five that carry out our bodies most important needs which are blood circulation, breathing, digestion, nerves and sensory organs, and the bones that hold us together. The additional systems include the muscular system, endocrine system, lymphatic system, urinary system, reproductive system, and the system of our skin, the integumentary system. Even though these are essential, our survival is unattainable when these ultimate needs of our bodies are not fulfilled.
The Primary Systems
Skeletal System
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Circulatory System
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Digestive System
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Respiratory System
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Nervous & Sensory
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