The longest cells in the human body are neurons. Neurons are cells within the nervous system and carry messages throughout the body.Continue Reading
Although they range in size, some neurons are 3 feet long. These include the neurons that go from the skin into the spinal cord and up into the brain stem. Their impressive length makes neurons the longest cells in the body. Neurons also hold the title of the longest living cells in the human body as well. While other cells in the body die and regenerate, many neurons remain the same throughout a person's lifetime.
Neurons serve a special purpose, sending signals from one part of the body to another. These messages, known as nerve impulses, are how the brain communicates. For example, if a person wants to run, neurons make it possible for the brain to tell the legs to move. However, not all neurons are created equally. There are five types in the body, each with its own specialty.Learn more about Cells
ATP is called the energy currency of the cell, and of life, because it is the energy molecule that all cells need in order to do anything within the human body. The molecule is used like a battery within cells and allows the consumption of one of its phosphorous molecules.Full Answer >
An example of a selectively permeable entity is the phospholipid bilayer cell membrane, which surrounds the cells of the human body. Selectively permeable cell membranes allow the passage of molecules through active or passive transport.Full Answer >
Osteoblasts and osteoclasts are types of cells the human body uses to repair broken bones. Osteoclasts break down old bone tissue allowing osteoblasts to replace it with new material. Together, these cells facilitate bone mending and bone growth.Full Answer >
The cellular level is the level of cells, the most basic structural units of the human body. Just like a house is made of many individual bricks sealed together by cement, the human body is comprised of millions of cells that combine to form tissues, organs and whole organisms.Full Answer >