Sperm is the male reproductive cell and is derived from the Greek word (σπέρμα) sperma (meaning "seed"). source
Sperm is the male reproductive cell and is derived from the Greek word (σπέρμα) sperma (meaning "seed").
A uniflagellar sperm cell that is motile is referred to as a spermatozoon, whereas a non-motile sperm cell is referred to as a spermatium. source
A uniflagellar sperm cell that is motile is referred to as a spermatozoon, whereas a non-motile sperm cell is referred to as a spermatium.
Sperm cells cannot divide and have a limited life span, but after fusion with egg cells during fertilization. source
Sperm cells cannot divide and have a limited life span, but after fusion with egg cells during fertilization.
The human sperm cell is haploid, so that its 23 chromosomes can join the 23 chromosomes of the female egg to form a diploid cell. source
The human sperm cell is haploid, so that its 23 chromosomes can join the 23 chromosomes of the female egg to form a diploid cell.
In mammals, sperm develops in the testicles and is released from the penis. It is also possible to extract sperm through TESE. source
In mammals, sperm develops in the testicles and is released from the penis. It is also possible to extract sperm through TESE.
Some sperm banks hold up to 170 litres (37 imp gal; 45 US gal) of sperm. source
Some sperm banks hold up to 170 litres (37 imp gal; 45 US gal) of sperm.
The mammalian sperm cell consists of a head, a midpiece and a tail. source
The mammalian sperm cell consists of a head, a midpiece and a tail.
The midpiece has a central filamentous core with many mitochondria spiralled around it, used for ATP production for the journey through the female cervix. source
The midpiece has a central filamentous core with many mitochondria spiralled around it, used for ATP production for the journey through the female cervix.
During fertilization, the sperm provides three essential parts to the oocyte: source
During fertilization, the sperm provides three essential parts to the oocyte:
Although semen contains millions of sperm, the egg will admit only one, the other ones will soon die and be absorbed. source
Although semen contains millions of sperm, the egg will admit only one, the other ones will soon die and be absorbed.
The spermatozoa of animals are produced through spermatogenesis inside the male gonads (testicles) via meiotic division. source
The spermatozoa of animals are produced through spermatogenesis inside the male gonads (testicles) via meiotic division.
The initial spermatozoon process takes around 70 days to complete. source
The initial spermatozoon process takes around 70 days to complete.
The spermatid stage is where the sperm develops the familiar tail. source
The spermatid stage is where the sperm develops the familiar tail.
The next stage where it becomes fully mature takes around 60 days when it is called a spermatozoan. source
The next stage where it becomes fully mature takes around 60 days when it is called a spermatozoan.
Sperm cells are carried out of the male body in a fluid known as semen. source
Sperm cells are carried out of the male body in a fluid known as semen.
Human sperm cells can survive within the female reproductive tract for more than 5 days post coitus. source
Human sperm cells can survive within the female reproductive tract for more than 5 days post coitus.
Sperm quantity and quality are the main parameters in semen quality, which is a measure of the ability of semen to accomplish fertilization. source
Sperm quantity and quality are the main parameters in semen quality, which is a measure of the ability of semen to accomplish fertilization.
On the global market, Denmark has a well-developed system of human sperm export. source
On the global market, Denmark has a well-developed system of human sperm export.
Motile sperm cells typically move via flagella and require a water medium in order to swim toward the egg for fertilization. source
Motile sperm cells typically move via flagella and require a water medium in order to swim toward the egg for fertilization.
In animals most of the energy for sperm motility is derived from the metabolism of fructose carried in the seminal fluid. source
In animals most of the energy for sperm motility is derived from the metabolism of fructose carried in the seminal fluid.
This takes place in the mitochondria located in the sperm's midpiece (at the base of the sperm head). source
This takes place in the mitochondria located in the sperm's midpiece (at the base of the sperm head).
Non-motile sperm cells called spermatia lack flagella and therefore cannot swim. source
Non-motile sperm cells called spermatia lack flagella and therefore cannot swim.
