Definitions of Human Body System:
- Cell: The structural and functional unit of a living organism.
- Tissue: A tissue is an ensemble of similar cells and their extracellular matrix from the same origin that together carries out a specific function.
- Organ: A group of tissues in a living organism that have been adapted to perform a specific function.
- Organ System: An organ system is a group of organs that work together to perform a certain function in an organism's body.
- Neuron: The structural and functional unit of the Brain.
- Nephron: The structural and functional unit of the Kidney.
What is in our body?
- Our body is made up of different systems
- Systems are made up of organs
- Organs are made up of tissues
- Tissues are made up of cells
Different systems of our body:
- Nervous System
- Skeletal System
- Muscular System
- Cardiovascular System or Circulatory System
- Respiratory System
- Digestive System
- Urinary System or Renal System
- Endocrine System
- Immune System
- Integumentary System
- Reproductive System
Nervous System:
The nervous system is a complex network of nerves and cells that carry messages to and from the brain and spinal cord to various parts of the body. The nervous system includes both the central nervous system and the peripheral nervous system.
Skeletal System:
The adult human skeletal system consists of 206 bones, as well as a network of tendons, ligaments, and cartilage that connects them. The skeletal system performs vital functions - support, movement, protection, blood cell production, calcium storage, and endocrine regulation that enable us to survive.
Muscular System:
The muscular system is responsible for the movement of the human body. Attached to the bones of the skeletal system are about 700 named muscles that make up roughly half of a person's body weight. Each of these muscles is a discrete organ constructed of skeletal muscle tissue, blood vessels, tendons, and nerves. Muscle tissue is also found inside the heart, digestive organs, and blood vessels. In these organs, muscles serve to move substances throughout the body.
Cardiovascular System or Circulatory System:
The circulatory system also called the cardiovascular system or the vascular system, is an organ system that permits blood to circulate and transport nutrients (such as amino acids and electrolytes). Oxygen, carbon dioxide, hormones, and blood cells to and from the cells in the body provide nourishment and help in fighting diseases, stabilizing temperature and ph, etc.
Respiratory System:
The human respiratory system is a series of organs responsible for taking in oxygen and expelling carbon dioxide. The primary organs of the respiratory system are the lungs, which carry out this exchange of gases as we breathe.
Digestive System:
The GI tract is a series of hollow organs joined in a long, twisting tube from the mouth to the anus. The hollow organs that make up the GI tract are the mouth, esophagus, stomach, small intestine, large intestine, and anus. The liver, pancreas, and gallbladder are the solid organs of the digestive system.
Urinary System or Renal System:
The urinary system, also known as the renal system, consists of the kidneys, ureters, bladder, and urethra. Each kidney consists of millions of functional units called nephrons.
Endocrine System:
The endocrine system is the collection of glands that produce hormones that regulate metabolism, growth, and development, tissue function, sexual function, reproduction, sleep, and mood, among other things.
Immune System:
The immune system is made up of a network of cells, tissues, and organs that work together to protect the body. One of the important cells involved are white blood cells, also called leukocytes, which come in two basic types that combine to seek out and destroy disease-causing organisms or substances.
Integumentary System:
The integumentary system is the set of organs that forms the external covering of the body and protects it from many threats such as infection, desiccation, abrasion, chemical assault, and radiation damage. The integumentary system is an organ system consisting of the skin, hair, nails, and exocrine glands.
Reproductive System:
The reproductive system or genital system is a system of sex organs within an organism that work together for the purpose of sexual reproduction.
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