Туалет ЛСТК

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The human body is a complex system that operates on multiple levels, from the molecular to the physiological. It consists of various organs and tissues that work together to maintain homeostasis and ensure overall health. The brain plays a crucial role in controlling bodily functions through neural signals, while hormones and neurotransmitters facilitate communication between different systems. The nervous system enables sensory perception, motor control, and cognitive processes like learning and memory. It includes the central nervous system (CNS), which comprises the brain and spinal cord, and the peripheral nervous system (PNS), which connects to the CNS via nerves. The endocrine system regulates various bodily functions through hormone secretion. This includes growth and development during puberty, reproductive cycles, and stress responses. The immune system protects against pathogens and foreign substances by producing antibodies and activating white blood cells. Digestion begins in the mouth, where food is broken down by enzymes and mechanical forces. It continues in the stomach, small intestine, and large intestine, with nutrients being absorbed into the bloodstream.