The largest cell in the male human body is the sperm cell, also known as a spermatozoon. It is approximately 50 micrometers long.
The smallest object visible to the human eye is about 0.1 millimeters in size, which is roughly the width of a human hair.
The smallest enzyme present in the human body is probably Triosephosphate isomerase.
The smallest unit containing the entire human genome is a single human cell, which includes all 23 pairs of chromosomes with the full set of DNA instructions for creating and maintaining a human being.
The smallest human bone is the stapes (aka stirrup) which is one of the three auditory ossicles of the middle ear.
The granule cell of the cerebellum is the smallest cell in the human body, but the red blood cell is the smallest blood cell.
The smallest blood vessels in the body are called capillaries.
The smallest blood vessels are the capillaries.
The male gamete - spermatozoon and the female gamete - ovum.
A Human Body on my right, a fat human body on my left
The largest cell in the male human body is the sperm cell, also known as a spermatozoon. It is approximately 50 micrometers long.
The smallest vessels in the human body are capillaries. They are the blood vessels that absorb oxygen into the blood and returning blood cells that lack oxygen back into the heart and lungs to be oxidised.
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The smallest arteries of the human body are the arterioles, which supply blood into the capillary network from the main arteries (artery-->arteriole-->capillary-->venule-->vein). They hold plasma and filtrates, and are usually only wide enough to hold a single red blood cell at a time (in some cases, they are smaller than a RBC).
The smallest object visible to the human eye is about 0.1 millimeters in size, which is roughly the width of a human hair.
The smallest unit of the brain is the neuron (nerve cell). It is the cell that forms larger nerves and neural tissue...which is then integrated together to form the modular systems of the brain.