The present study is the first record of black scorpionfish digestive tract histology, suggesting that its histological features are mostly similar to those of other carnivorous fish and congruent to
its feeding habits. The digestive systems of five specimens of the black scorpionfish, Scorpaena porcus L., from the eastern Adriatic Sea, were analysed histologically. The paraffin sections of oesophagus, stomach, intestine, liver, gallbladder and pancreas have been stained by hematoxylin – eosin technique in order to distinguish the main histological features of the digestive system in black scorpionfish. The wall of oesophagus and stomach is formed by four distinctive layers: the mucosa, the submucosa,
the muscular and the outer layer. The wall of intestine and gallbladder consisted of three distinctive layers: the mucosa, the muscular and the outer layer. The mucosa is the innermost layer, which consists of two different layers: the epithelium and lamina propria. The submucosa is a layer of connective tissue with blood vessels and nerve fibres, and it has not been seen in the intestine and
gallblader. In the oesophagus, stomach and intestine, the muscular layer consists of two layers of muscle fibres: circular and longitudinal. In the oesophagus the inner muscular layer consisted
of longitudinally arranged striated, while the outer layer consisted of circular muscle fibres. The arrangement of muscular layers in the stomach and intestine is reverse. The muscular layer in the
gallbladder is made of a single layer of smooth muscular tissue. The outermost layer of the upper parts of visceral organs is adventitia consisting of connective tissue. In the caudal parts of digestive
tract, this layer is replaced by serosa. The liver consists of hepatocytes that are surrounded by mass of fat – storing cells. The arrays of hepatocytes are separated by system of sinusoidal capillaries. The present study is the first record of black scorpionfish digestive tract histology, suggesting that its histological features are mostly similar to those of other carnivorous fish and congruent to
its feeding habits. The digestive systems of five specimens of the black scorpionfish, Scorpaena porcus L., from the eastern Adriatic Sea, were analysed histologically. The paraffin sections of oesophagus, stomach, intestine, liver, gallbladder and pancreas have been stained by hematoxylin – eosin technique in order to distinguish the main histological features of the digestive system in black scorpionfish. The wall of oesophagus and stomach is formed by four distinctive layers: the mucosa, the submucosa, the muscular and the outer layer. The wall of intestine and gallbladder consisted of three distinc tive layers: the mucosa, the muscular and the outer layer. The mucosa is the innermost layer, which consists of two different layers: the epithelium and lamina propria. The submucosa is a layer of
connective tissue with blood vessels and nerve fibres, and it has not been seen in the intestine and gallblader. In the oesophagus, stomach and intestine, the muscular layer consists of two layers
of muscle fibres: circular and longitudinal. In the oesophagus the inner muscular layer consisted of longitudinally arranged striated, while the outer layer consisted of circular muscle fibres. The
arrangement of muscular layers in the stomach and intestine is reverse. The muscular layer in the gallbladder is made of a single layer of smooth muscular tissue. The outermost layer of the upper
parts of visceral organs is adventitia consisting of connective tissue. In the caudal parts of digestive tract, this layer is replaced by serosa. The liver consists of hepatocytes that are surrounded by mass
of fat – storing cells. The arrays of hepatocytes are separated by system of sinusoidal capillaries.Ovaj rad predstavlja prvi zapis o histološkoj građi probavnog sustava škrpuna i ukazuje na sličnost građe probavnog sustava s probavnim sustavom većine mesojednih riba, a u skladu s njegovim prehrambenim navikama. Probavni sustav pet primjeraka škrpuna
Scorpaena porcus L., iz istočnog Jadranskog mora je histološki istražen. Parafinski rezovi jednjaka, želuca, crijeva, jetre, gušterače i žučnog mjehura bojeni su hemalaun – eozin tehnikom, kako bi se utvrdila osnovna histološka građa pojedinih dijelova probavnog sustava. U stijenci jednjaka i želuca škrpuna razlikuju se četiri sloja: sluznica, podsluznica, mišićni i vanjski sloj. U stijenci crijeva i žučnog mjehura razlikuju se tri sloja: sluznica,mišićni i vanjski sloj. Sluznica (
tunica mucosa ) oblaže lumen probavne cijevi i sastoji se od dva
različito građena sloja: epitel (lamina epithelialis) i proprija (
lamina propria).
Lamina muscularis mucosaese ne uočava. Podsluznica (tunica submucosa) je sloj vezivnog tkiva u kojem su uložene veće krvne žile i živčana vlakna, a ne uočava se u stijenci crijeva i žučnog mjehura. Mišićni sloj jednjaka, želuca i crijeva sastoji se od dva sloja: kružnog i uzdužnog. U mišićnom sloju jednjaka unutrašnji sloj izgrađuju uzdužno, a vanjski kružno raspoređena mišićna vlakna, dok je u mišićnom sloju želuca i crijeva raspored mišićnih slojeva obrnut. Vanjski kružni mišićni sloj jednjaka građen je od poprečno – od prugastih mišića, dok je u ostalim dijelovima probavne cijevi mišićni sloj građen od glatkih mišićnih stanica. Mišićni sloj žučnog mjehura građen je od jednog sloja glatkih mišićnih stanica. Vanjski sloj prednjeg dijela probavne cijevi je tunica adventitia
građena od vezivnog tkiva.
U stražnjem dijelu probavnog sustava vanjski sloj čini tunica serosa
ili ovoj peritonealnog mezotela.Jetra se sastoji od hepatocita okruženih mnoštvom masnih stanica. Između hepatocita su smještene
sinusoidne kapilare. Gušterača se sastoji od seroznih acinusa
