One of the most taken for granted topics of discussion is human anatomy and physiology. Comprised of ten (10) major systems, the human body is truly amazing. These systems provide strength, structure, filters, protection, circulation, respiration, digestion, cover, and the ability to reproduce itself. The largest of the systems is the integumentary, or skin. It serves as a protective covering for other body systems and protects vital organs and tissues. It also functions as a temperature regulator by excreting wastewater and holds nerve endings that send messages to the brain.
Human Anatomy And Physiology
The skeletal system provides structure to the body. Bones make up the skeletal system, some fused together, as in the skull and pelvis, and some supported by other bones by means of cartilage, muscle, ligaments, and tendons. The largest bone is the femur, or thighbone, and the smallest is the stapes in the middle ear. Only one bone in the human body does not connect with any other bone, that being the hyoid bone in the neck. This accounts for but one of the strange anomalies of human anatomy and physiology. The circulatory system provides another quirk of the human body. While pumping blood through a system of blood vessels, arteries carry oxygenated blood away from the lungs and heart, while veins carry unoxygenated blood back to the heart and lungs. Pulmonary arteries carry unoxygenated blood away from the heart and into the lungs for re-oxygenation, while pulmonary veins carry oxygenated blood from the lungs into the heart. Arteries, with their strong, elastic walls, always carry blood away from the pumping action of the heart, while veins carry blood back toward the heart. Oxygenated blood passes through the tissues of the entire body via arteries leaving oxygen. The deoxygenated blood then flows back to the heart through the venous system. Closely related to the circulatory system is the respiratory system. As blood passes through the lungs, it picks up oxygen for disbursement to tissues and other body systems.
As we continue is exploring human anatomy and physiology we find the digestive system. This system allows the body to take in nourishment, convert it to energy, and dispose of the rest. The alimentary canal comprises the main portions of digestion, from the mouth, through the esophagus, into the stomach, and passing through the intestines to exit the body. The liver and kidneys supplement digestion by providing digestive enzymes and filters. The digestive system provides the body with a complex system of breaking down food into different components for immediate use, or store within the body for future use. This is a marvel of human anatomy and physiology.
Human Anatomy And Physiology – Conclusion
The body transmits signals to the brain by means of the nervous system. The brain then processes these signals and controls various body functions. The nervous system controls the muscular system in two ways. One, by receiving messages that make muscles work voluntarily as needed, and by making other muscles work automatically on an ongoing basis. The digestive system is an example of the automatic workings of the nervous system.
A human body should be respected and well cared for. Understand human anatomy and physiology as a means to accomplish this.