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6 days ago · Learn about the structure, function, and composition of the human body, the physical substance of the human organism. Explore the tissues, organs, systems, and biochemical constituents that make up the human body and how they develop and change over time.
- The Editors of Encyclopaedia Britannica
The human body is the entire structure of a human being. It is composed of many different types of cells that together create tissues and subsequently organs and then organ systems . They ensure homeostasis and the viability of the human body.
- Skeletal system. The skeletal system is composed of bones and cartilages. There are two parts of the skeleton; axial and appendicular. The axial skeleton consists of the bones of the head and trunk.
- Muscular system. The muscular system consists of all the body muscles. There are three muscle types; smooth, cardiac and skeletal muscles. Smooth muscle is found within walls of blood vessels and hollow organs such as the stomach or intestines.
- Cardiovascular system. The cardiovascular system is comprised of the heart and the circulatory system of blood vessels. The heart is composed of four chambers; two atria and two ventricles.
- Respiratory system. The respiratory system consists of a series of organs; the nasal cavity, pharynx, larynx, trachea, bronchi, bronchioles and lungs (alveoli).
Jun 20, 2023 · Learn about the structure and function of the human body's 11 organ systems, such as the circulatory, respiratory, digestive, skeletal, muscular, and nervous systems. Find out how each organ system works with others to perform essential activities like breathing, digestion, and movement.
Apr 5, 2024 · Here's a quick rundown of the systems of the human body, its vital organs and its "vestigial" organs, as well as a few fascinating facts about how the body works. What are the different systems...
Learn how the human body works, from head to toe, with this comprehensive guide by National Geographic. Explore the brain, heart, digestive system, lungs, skin and more with photos, videos and interactive features.
Overview of the Human Body: Ce... video. The biology of the human body includes. Physiology (how the body functions) Anatomy (how the body is structured) Anatomy is organized by levels, from the smallest components of cells to tissues and organs and to organ systems.
