Carl Heitzmann was an Austrian

Austrians

Austrians are a nation and ethnic group, consisting of the population of the Republic of Austria and its historical predecessor states who share a common Austrian culture and Austrian descent....

 pathologist and dermatologist.

Heitzmann was born in Vinkovci

Vinkovci

Vinkovci is a city in Croatia, in the Vukovar-Syrmia County. In the 2011 census, the total population of the city was 35,375, making it the largest town of the county...

 (then Syrmia/Szerém/Srijem, Slavonia, Kingdom of Hungary

Kingdom of Hungary

The Kingdom of Hungary comprised present-day Hungary, Slovakia and Croatia , Transylvania , Carpatho Ruthenia , Vojvodina , Burgenland , and other smaller territories surrounding present-day Hungary's borders...

, today Croatia

Croatia

Croatia , officially the Republic of Croatia , is a unitary democratic parliamentary republic in Europe at the crossroads of the Mitteleuropa, the Balkans, and the Mediterranean. Its capital and largest city is Zagreb. The country is divided into 20 counties and the city of Zagreb. Croatia covers ...

) and studied medicine in Budapest

Budapest

Budapest is the capital of Hungary. As the largest city of Hungary, it is the country's principal political, cultural, commercial, industrial, and transportation centre. In 2011, Budapest had 1,733,685 inhabitants, down from its 1989 peak of 2,113,645 due to suburbanization. The Budapest Commuter...

 and Vienna

Vienna

Vienna is the capital and largest city of the Republic of Austria and one of the nine states of Austria. Vienna is Austria's primary city, with a population of about 1.723 million , and is by far the largest city in Austria, as well as its cultural, economic, and political centre...

, earning his doctorate in 1859.
After graduation he furthered his studies in Vienna under Franz Schuh

Franz Schuh (physician)

Franz Schuh was an Austrian pathologist and surgeon who was a native of Scheibbs....

 (1804 - 1864), Ferdinand Hebra

Ferdinand Ritter von Hebra

Ferdinand Ritter von Hebra was an Austrian physician and dermatologist,...

 (1816 - 1880), Salomon Stricker

Salomon Stricker

Salomon Stricker – 2 April 1898) was an Austrian pathologist and histologist who was born in Waag-Neustadtl, which is now part of Slovakia. He studied at the University of Vienna, and subsequently became a research assistant at the Institute of Physiology under Ernst Wilhelm von Brücke...

 (1834 - 1898), and Carl Rokitansky

Carl Freiherr von Rokitansky

Baron Carl von Rokitansky , was a Bohemian physician, pathologist, humanist philosopher and liberal politician.-Medical career:...

 (1804 - 1878). When he was unable to succeed Rokitansky as the chair of pathology at Vienna, he emigrated to New York in 1874, where he was one of the founders of the American Dermatological Association (ADA).

Heitzmann is credited for being the first physician to describe the precursor corpuscle

Corpuscle

Corpuscle may refer to:*a small free floating biological cell, especially a blood cell, but not a fat cell*a nerve ending such as Meissner's corpuscle or a Pacinian corpuscle*any member of Corpus Christi College, Cambridge or Corpus Christi College, Oxford...

s of red cells, which he referred to as hematoblasts. In 1872 he documented his findings in a treatise titled Studien am Knochen und Knorpel, where he mentions that his discovery of the hematoblast was in the bone marrow

Bone marrow

Bone marrow is the flexible tissue found in the interior of bones. In humans, bone marrow in large bones produces new blood cells. On average, bone marrow constitutes 4% of the total body mass of humans; in adults weighing 65 kg , bone marrow accounts for approximately 2.6 kg...

 of an injured dog's leg.

Heitzmann was a skilled illustrator

Illustrator

An Illustrator is a narrative artist who specializes in enhancing writing by providing a visual representation that corresponds to the content of the associated text...

 and lithographer, and renowned for his work with water color

Watercolor painting

Watercolor or watercolour , also aquarelle from French, is a painting method. A watercolor is the medium or the resulting artwork in which the paints are made of pigments suspended in a water-soluble vehicle...

s. Among his artistic works are water color illustrations he created with Anton Elfinger

Anton Elfinger

Anton Elfinger was an Austrian physician and illustrator. He trained at the Academy of Fine Arts Vienna, and later studied medicine, earning his medical doctorate in 1845. Afterwards he was an assistant to dermatologist Ferdinand von Hebra in Vienna. From 1849 until 1858 he was an illustrator of...

(1821 - 1864) in Hebra's 1876 Atlas der Hautkrankheiten (Atlas of Skin Diseases). Among Heitzmann's written works was the popular Compendium der chirurgischen Pathologie und Therapie (Compendium of Surgical Pathology and Therapy, two volumes- 1864 & 1868).