It's so small! Human sperm is not as long as the sperm of a fly?!
Human sperm are tadpole-shaped, with a head length of 3.5-5.0 microns, a body length of 5-7.0 microns, and a tail length of 45 microns, which are invisible to the naked eye and require a microscope magnified 400 times to see their trajectory.
Among the creatures in nature, the most incredible thing is the sperm of the fruit fly! According to studies, the sperm of the fruit fly is up to 5 .8cm long, the longest sperm in the world, and no animal can currently exceed its sperm length, not even elephants, whales and other behemoths! Although the sperm of a fruit fly is entangled in a clump and looks small, it can reach a staggering length of 5 .8cm, and the length of fruit fly sperm is about 20 times the length of the fruit fly!
According to common sense, large animals should be able to produce large animal sperm, but in fact, on the contrary, the sperm length of fruit flies is 5 .8cm, the length of sperm in mice is about 124 microns, the length of human sperm is about 55 microns, and the length of elephants is about 56 microns, which confirms that the larger the sperm of the animal, the smaller the sperm!
#精液分析 #
