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Biology is a very interesting subject that helps us understand the essence of nature. Human body is a complex and mysterious system that is composed of billions of cells. They work together and help us to execute various activities of daily life. The organs in the body help it to regulate the activities and perform various functions in response to the external environment. The living and non-living cells in the Human body are responsible to execute biological and chemical interactions taking place inside the body. The percentage of water is high in the human body and it is composed of 70% water.
Human body and its Synthesis
The structure of the human body is composed of microscopic units called cells. These are the basic units of the human body. There are 30-50 trillion cells in the body and the formation of new cells, as well as decomposition of new cells, takes place every day. The cells of the body combine together to form a tissue join various human body parts together at a proper manner. An organ is formed from the combination of tissue that combines in order to execute a special function. These organs are further arranged together in the form of systems to perform the complex functions within the body required for everyday living.
Cell → Tissue → Organ → System → Organism
Chemical Composition of Human body
In the chemical aspect, the human body is composed of organic materials and water. The chemical composition can be presented as follows:
Chemical component | Description |
|---|---|
Water | It is the major component of the body. It can be found in blood, lymph, plasma, and interstitial fluid. |
Lipids | Fat provides energy and phospholipids as well as cholesterol are the main component of the cell membrane. |
Proteins | They are the structural component of the body. These are the building blocks of cell membranes. |
Carbohydrates | They are stored in the body and act as the fuel for the body. |
Nucleic acids | They define the major components of genetic materials present in the body. |
Table 1: Chemical makeup of the human body parts
Anatomy of the Human body
The anatomy describes the basic human body diagram. The human body consists of the skeleton and muscles. The skeleton provides the structure to the body and protects the vital organs inside the body. Muscles are attached to the bones and are specialized tissues that help in the locomotion and movement of the body. The muscles pull and push the bones that help the body to perform the movement. There are 5 basic human body parts. They are the head, neck, torso, arms, and legs. The neck connects the torso with the heads. The skeleton of the human body is made up of bone and cartilage and is surrounded by connective tissues and ligaments that connect various bones in the human body structure. The spinal cord composed of nerve fibers gives support to the body and these nerves connect the brain with the spinal cord of the body. Blood vessels carry blood from the heart and supply it to the various human body parts. The main human body parts are the heart, liver, brain, lungs, and kidneys.
Physiology of the Human body
Physiology defines the various functions of the human body parts. The various systems present within the body carry out complex functioning of the body:
- Circulatory system
This system is for pumping blood from the heart to the lungs in order to get oxygen. The heart, arteries, veins, and liver are the major components of the circulatory system. This is further carried to the various human body parts.
- Central Nervous system
This system consists of the brain and spinal cord and is responsible for passing information and establishing coordination in the body.
- Digestive system
This system breaks the complex food into simpler components and with the help of digestive juices helps in the digestion of food. The food is converted into energy that acts as fuel for the body. The main components of this system are mouth, stomach, pancreas, liver, large intestine and anus. The other organs that an important role is esophagus, gall balder and small intestine.
- Reproductive system
The birth of new offspring and the continuation of generation takes place with the help of the reproductive system. The uterus and testis is the main reproductive organ of female and male respectively.
- Respiratory system
The organs such as the nose, windpipe, and lungs comprise the respiratory system and they help us to breathe with the intake of fresh air and removal of waste materials from the body.
- Excretory system
This system carries out functions of excretion that helps in the removal of waste materials from the body. This system includes the liver, skin, kidney, large intestines, and lungs.
Conclusion
This article has discussed the various aspects of the human body. The human body is a complex system and is composed of various cells that make various systems of the body. The discussion has been made on the chemical human body structure which makes up the human body diagram. The explanation of various human body parts is provided and its anatomy and physiology are discussed. This describes the various systems and their function in the human body. The section of “frequently asked questions and answers the major confusing questions.
