7ITA CAT LADY

sketchfab

The human body is made up of approximately 60 trillion cells, each one a complex system of organs, tissues, and systems that work together to keep us alive and functioning properly. The brain, the largest organ in our bodies, weighs about three pounds and uses up around 20% of our total daily caloric intake despite accounting for only about 2% of our body weight. The heart pumps blood throughout our entire circulatory system, supplying oxygen and nutrients to every cell in our body while also removing waste products. The lungs expand and contract with each breath we take, drawing oxygen into the bloodstream and expelling carbon dioxide. The liver filters out toxins and helps regulate our metabolism, breaking down food into energy that can be used by our bodies. Our immune system is made up of a complex network of cells and tissues that work together to protect us from infection and disease. White blood cells are constantly on the lookout for invaders, attacking and destroying any foreign substances that threaten our health. The skin provides an additional layer of protection, forming a barrier between our internal organs and the outside world. Our senses play a crucial role in helping us navigate the world around us. Our eyes detect light and color, allowing us to see and perceive our surroundings. Our ears pick up sound waves, enabling us to hear and communicate with others. Our nose detects smells, while our tongue tastes flavors and textures.