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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).
Jan 26, 2024 · Learn about the vital and non-vital organs of the body and their functions, as well as the organ systems that support them. Find out how to maintain optimum health and what conditions can affect the organs.
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.
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.
Get introduced to the major organ systems of the human body! You’ll learn some general anatomy (a roadmap of your body), learn how the arm bone actually connects to the shoulder bone, and how the different organs work together to keep you alive.
