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Diameters, area, and form of the optic nerve scleral canal were measured in 107 freshly enucleated, unfixed, human donor eyes. Macrophotographs of the sectioned posterior fundus pole were provided with a millimeter scale and evaluated planimetrically. They revealed a surprising variation: area: 2.59 ± 0.72 mm2 (minimum 0.68 mm2, maximum 4.42 mm2); minimal diameter: 1.67 ± 0.72 mm; maximal diameter: 1.92 ± 0.32 mm. The mean form factor was 0.92 ± 0.11 and the quotient of minimal to maximal diameter 0.86 ± 0.11, indicating a slightly oval nearly round form. The coefficients of variation of the method's reproducibility were 0.005 for intraobserver and 0.02 for interobserver determination. The size values of these optic nerve scleral canals were not significantly (Wilcoxon-Mann-Whitney test) different from than those of 100 unselected optic discs that had been determined intravitally using Littmann's method. This indicates the reliability of Littmann's method for the intravital measurement of the optic nerve head in absolute dimensions.
What else can I help you with?
What type of cell is the longest in the human body?
The longest cells are neurons (nerve cells) with a length of 90cm-100cm linking the central nervous system (brain and spinal cord) to other parts of the body.
What is the difference between a human nerve cell and plant guard cell?
A human nerve cell is a specialized cell in the nervous system that transmits electrical signals, while a plant guard cell is a specialized cell in plants responsible for regulating gas exchange and water loss through openings called stomata. Nerve cells are found in animal tissues, while guard cells are unique to plants.
What is the type of adult human cell usually does not reproduce itself by mitosis?
Most adult human cells that do not reproduce themselves by mitosis are nerve cells, or neurons. This is because neurons are terminally differentiated cells and typically do not undergo cell division in adults.
You would be unlikely to see which human cells dividing?
You would be unlikely to see nerve cells dividing, as they are primarily post-mitotic and do not typically undergo cell division in adults.
Is the longest cell the nerve cell of the giant squid?
No, the nerve cell of a giraffe is typically considered the longest cell, as it can reach up to 9 feet in length. The nerve cell of the giant squid can be long, but not as long as the nerve cell of a giraffe.
The longest cell in human body?
The Longest cell in the human body is the nerve cell.
How big is the nerve cell in your leg?
big
What the longest cell in the human body?
Nerve cell is the longest cell in human body.
What are special connection between nerve cells and human cells?
Human cells also include human nerve cell. The connections are from the nerve cell to the other cells by way of extensions called dendrites.
How big is an nerve cell?
5 to 100 micrometers
Are human nerve cell found in prokaryotic or eukaryotic cells?
Human nerve cells are eukaryotic cells, just like every other human cell.
What type of cell is the longest in the human body?
The longest cells are neurons (nerve cells) with a length of 90cm-100cm linking the central nervous system (brain and spinal cord) to other parts of the body.
How many chromosomes are in a human nerve cell?
Humans have 46 chromosomes in their nerve cells, unless they have a chromosomal disorder. With the exception of the reproductive cells, which only carry half the chromosomal DNA, all human cells have the same amount of chromosomes.
What does a human nerve cell carry?
Electric stimulants which trigger the cells themselves
What is the difference between a human nerve cell and plant guard cell?
A human nerve cell is a specialized cell in the nervous system that transmits electrical signals, while a plant guard cell is a specialized cell in plants responsible for regulating gas exchange and water loss through openings called stomata. Nerve cells are found in animal tissues, while guard cells are unique to plants.
What Nerve cell?
A nerve cell is the structural and functional unit of a nerve
How many chromosomes will a human liver cell have when compared with a human nerve cell?
Both human liver cells and human nerve cells will have the same number of chromosomes, which is 46. This is because all body cells in humans (somatic cells) have the same number of chromosomes, which are inherited from the parents and not altered during differentiation into different cell types.
