Neither the ovum nor the spermatozoon (the human race is referred to) is capable alone of developing into a new individual.
"Taboo and Genetics" by Melvin Moses Knight, Iva Lowther Peters, and Phyllis Mary Blanchard
When we turn to the starting point of human development, we find an egg cell and a spermatozoon, which unite and whose nuclei intermingle.
"Scientific American Supplement, No. 810, July 11, 1891" by Various
The spermatozoon, after being deposited in the vagina, travels to the mouth of the womb, then up through the womb into one of the tubes.
"Herself" by E. B. Lowry
The spermatozoon fertilises the ovum, introducing 2 chromosomes.
"The Outline of Science, Vol. 1 (of 4)" by J. Arthur Thomson
Fertilization is effected by a spermatozoon meeting with the ovum.
"Text Book of Biology, Part 1: Vertebrata" by H. G. Wells
Mitosoma: the middle piece of a developing spermatozoon.
"Explanation of Terms Used in Entomology" by John. B. Smith
In the human spermatozoon the head is ovoid, appearing pear-shaped or pointed in one view and elliptical in another.
"The Biology, Physiology and Sociology of Reproduction" by Winfield S. Hall
The egg is a cell, and the spermatozoon is a cell.
"A Critique of the Theory of Evolution" by Thomas Hunt Morgan
The mature spermatozoon with its forked anterior end appears in figure 93.
"Studies in Spermatogenesis (Part 1 of 2)" by Nettie Maria Stevens
In normal fertilization, as a rule, only one spermatozoon fuses with the ovum.
"Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3" by Various
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Our world is filled with swimming microorganisms: The spermatozoon that fuse with the ovum during fertilization, the bacteria that inhabit our guts, the protozoa in our ponds, and the algae in the ocean.
The hydrodynamics of swimming microorganisms
Spiroplasma, with a single kink separating regions of right-handed and left-handed coiling. (e) Human spermatozoon. (f ) Mouse spermatozoon. (g) Chlamydomonas. (h) A smallish Paramecium.
The hydrodynamics of swimming microorganisms
Spermatozoon tendency to accumulate at walls is strongest mechanical response. J.
The hydrodynamics of swimming microorganisms
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