Complete answer: Neuron also known as a nerve cell is a cell that is the longest cell of animals which has the capability to get excited by electrical or chemical impulse.
What cell is the longest cell?
The longest cell is the nerve cell.
What is the longest nerve cell in animals?
The giant axon of the squid is the largest known nerve cell in the animal kingdom. They can be up to 1mm in diameter and almost a metre long.
What is the oldest cell in the human body?
The oldest cells in the human body are the NEURONS. They do not grow old like the other cells in our body and therefore are not replaced by new cells. They hold the title of longest living cells in the body. While other cells in the body die and regenerate, many neurons remain the same throughout a person’s lifetime.
Who is the smallest cell?
Answer: A cell is described as the smallest, basic unit of life in charge of all the processes of life. The Cerebellum’s Granule Cell is the smallest cell in the human body that is between 4 micrometers to 4.5 micrometers long. The RBC ‘s size also found roughly 5 micrometers.
Which animal cell is long and branched?
nerve cells are branched in animals like humans. An animal cell which has a branched structure is nerve cell also known as neuron.
What animal has the most neurons?
Dogs Have the Most Neurons, Though Not the Largest Brain: Trade-Off between Body Mass and Number of Neurons in the Cerebral Cortex of Large Carnivoran Species.
What is the longest nerve cell?
The longest axons in the human body are those of the sciatic nerve, which run from the base of the spinal cord to the big toe of each foot. The diameter of axons is also variable. Most individual axons are microscopic in diameter (typically about one micrometer (µm) across).
How long is the human body designed to live?
The analysis of dynamics of the body mass in human population indicates extremums, which correspond to mean (70–75 years), the commonly accepted maximum (100–110 years) and maximum known (140–160 years) lifespan.
What is the lifespan of a cell?
Skin cells live about two or three weeks. Colon cells have it rough: They die off after about four days. Sperm cells have a life span of only about three days, while brain cells typically last an entire lifetime (neurons in the cerebral cortex, for example, are not replaced when they die).
Which cells in the body are never replaced?
The Question: Which cells in the human body are never replaced? The Short Answer: So far, the only cell type that we can confidently say is never replaced is cerebral cortex neurons.
Is a virus a cell?
Because they can’t reproduce by themselves (without a host), viruses are not considered living. Nor do viruses have cells: they’re very small, much smaller than the cells of living things, and are basically just packages of nucleic acid and protein.
What is the biggest cell in the female human body?
The ovum is one of the largest cells in the human body, typically visible to the naked eye without the aid of a microscope or other magnification device. The human ovum measures approximately 0.1 mm (0.0039 in) in diameter.
Which is the smallest bacteria in the world?
Pelagibacter ubique is one of the smallest known free-living bacteria, with a length of 370 to 890 nm and an average cell diameter of 120 to 200 nm. They also have the smallest free-living bacterium genome: 1.3 Mbp, 1354 protein genes, 35 RNA genes.