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Mar 25, 2019 · Organ Definition. An organ is a self-contained group of tissues that performs a specific function in the body. The heart, liver, and stomach are examples of organs in humans. The word organ comes from the Latin organum, which means “instrument”. This in turn comes from the Greek word ὄργανον (órganon), which refers to a musical ...
- 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 · The five vital organs are as follows: brain. heart. lungs. liver. kidneys. It is not possible to live without these organs. That said, in the case of the paired kidneys and lungs, a person can ...
Sep 19, 2024 · There are 11 major organ systems in the human body: The circulatory (cardiovascular) system. The lymphatic system. The respiratory system. The integumentary system. The endocrine system. The gastrointestinal (digestive) system. The urinary (excretory) system. The musculoskeletal system.
- Central nervous system. Meninges. Pia mater. 1/3. Synonyms: none. The meninges are the three layers that surround all the components of the central nervous system.
- Peripheral nervous system. Components and divisions. The peripheral nervous system consists of the all the neural tissues located outside the central nervous system
- Facial organs. Eyes. The eye is technically a part of the brain, from which it develops. The outer surface of the front of the eye is called the cornea, which itself is covered with conjunctiva (a thin layer of cells).
- Thorax. Esophagus. Oesophagus. 1/4. Synonyms: none. The oesophagus is a muscular tube that connects the pharynx to the stomach. It enables food and fluids to enter the stomach through peristalsis.
For example, in the disorder hypertension, the prefix “hyper-” means “high” or “over,” and the root word “tension” refers to pressure, so the word “hypertension” refers to abnormally high blood pressure. Figure 1.2. Organ Systems of the Human Body (continued). Organs that work together are grouped into organ systems.
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Organs are the next level of organization of the human body. An organ is a structure that consists of two or more types of tissues that work together to do the same job. Examples of human organs include the heart, brain, lungs, skin, and kidneys. Human organs are organized into organ systems, which are shown in Figure 4.4.
