Martin Barry (28 March 1802, Fratton,

Portsmouth Portsmouth ( ) is a port city status in the United Kingdom, city and unitary authority in Hampshire, England. Most of Portsmouth is located on Portsea Island, off the south coast of England in the Solent, making Portsmouth the only city in En ...

, Hampshire – 27 April 1855,

Beccles Beccles ( ) is a market town and civil parishes in England, civil parish in the East Suffolk District, East Suffolk district, in the county of Suffolk, England.OS Explorer Map OL40: The Broads: (1:25 000) : . The town is located along the A145 r ...

, Suffolk), was a British physician who studied

histology Histology, also known as microscopic anatomy or microanatomy, is the branch of biology that studies the microscopic anatomy of biological tissue (biology), tissues. Histology is the microscopic counterpart to gross anatomy, which looks at large ...

and

embryology Embryology (from Ancient Greek, Greek ἔμβρυον, ''embryon'', "the unborn, embryo"; and -λογία, ''-logy, -logia'') is the branch of animal biology that studies the Prenatal development (biology), prenatal development of gametes (sex ...

Career

He qualified as a doctor in

Edinburgh Edinburgh is the capital city of Scotland and one of its 32 Council areas of Scotland, council areas. The city is located in southeast Scotland and is bounded to the north by the Firth of Forth and to the south by the Pentland Hills. Edinburgh ...

in 1833, and then studied at the

University of Heidelberg Heidelberg University, officially the Ruprecht Karl University of Heidelberg (; ), is a public university, public research university in Heidelberg, Baden-Württemberg, Germany. Founded in 1386 on instruction of Pope Urban VI, Heidelberg is List ...

. He was elected a fellow of the

Royal Society The Royal Society, formally The Royal Society of London for Improving Natural Knowledge, is a learned society and the United Kingdom's national academy of sciences. The society fulfils a number of roles: promoting science and its benefits, re ...

in 1840, and had the previous year, in 1839, been awarded the Society's

Royal Medal The Royal Medal, also known as The Queen's Medal and The King's Medal (depending on the gender of the monarch at the time of the award), is a silver-gilt medal, of which three are awarded each year by the Royal Society. Two are given for "the mo ...

for his work on embryology. He was the first to discover the segmentation of yolk in the mammalian ovum. He enunciated the doctrine that all cells were descended from an original mother cell by cleavage of the nucleus. One of his most fundamental discoveries, published in

Philosophical Transactions ''Philosophical Transactions of the Royal Society'' is a scientific journal published by the Royal Society. In its earliest days, it was a private venture of the Royal Society's secretary. It was established in 1665, making it the second journ ...

in 1843, was that

spermatozoa A spermatozoon (; also spelled spermatozoön; : spermatozoa; ) is a motile sperm cell (biology), cell produced by male animals relying on internal fertilization. A spermatozoon is a moving form of the ploidy, haploid cell (biology), cell that is ...

could sometimes be found inside the

ovum The egg cell or ovum (: ova) is the female reproductive cell, or gamete, in most anisogamous organisms (organisms that reproduce sexually with a larger, female gamete and a smaller, male one). The term is used when the female gamete is not capa ...

. The note that Barry published was titled ''On the Penetration of Spermatozoa into the Interior of the Ovum''. This work, carried out with rabbits, influenced Theodor Ludwig Wilhelm Bischoff's theories concerning

fertilisation Fertilisation or fertilization (see spelling differences), also known as generative fertilisation, syngamy and impregnation, is the fusion of gametes to give rise to a zygote and initiate its development into a new individual organism or of ...

, but it was not until 1876 that

Oscar Hertwig Oscar Hertwig (21 April 1849 in Friedberg – 25 October 1922 in Berlin) was a German embryologist and zoologist known for his research in developmental biology and evolution. Hertwig is credited as the first person to observe sexual reproduc ...

, working with sea urchins, described the fusion of sperm and egg to form a new structure. He was President of the Royal Medical Society of Edinburgh in 1836.

References

Sources

*
Entry for Barry
in the Royal Society's Library and Archive catalogue's details of Fellows (accessed 21 April 2008) {{DEFAULTSORT:Barry, Martin 1802 births 1855 deaths 19th-century English medical doctors British embryologists Fellows of the Royal Society Fellows of the Royal Society of Edinburgh Alumni of the University of Edinburgh Health professionals from Portsmouth Royal Medal winners