Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
권호 표지

A Histological Study on the Heart in the False dace (Pseudorasbora parva)

참붕어(Pseudorasbora parva) 심장의 조직학적 연구

  • Received : 2015.03.09
  • Accepted : 2015.03.26
  • Published : 2015.03.31
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Abstract

The histological structure of the heart in Pseudorasbora parva was investigated by light microscope. The heart consisted of four consecutive chambers, the sinus venosus, atrium, ventricle and bulbus arteriosus. The wall of the sinus venosus was divided into endocardium, myocardium and epicardium, and the walls of the atrium and ventricle were divided into endocardium, subendocardium, myocardium, subepicardium and epicardium, and the wall of the bulbus arteriosus was divided into endocardium, subendocardium (ridge tissue), middle layer, subepicardium and epicardium. The valves were observed in the sinoatrial, artrioventricular and bulboventricular junctions. The sinus venosus wall was mostly made up of collagen. The rings of tissue were observed at the sinoatrial junction. The atrium was composed of a spongy trabeculate myocardium surrounded by an external rim of thin myocardium, and collagens were distributed in the subepicardium and trabeculae. The ventricle was a spongy myocardium with vessels in subepicardium. In the subepicardium and trabeculae of the ventricle, collagens were distributed. In the bulbus arteriosus, the diameter and length of the ridges were differed. The endocardial cells were convex and the non-clustered subendocardial cells showed irregular shapes. The cells of the middle layer were arranged into incomplete layers that showed different orientations. The subepicardium was formed by cells of different morphology. Collagens and elastins were demonstrated in the subendocardium, middle layer and subepicardium of the bulbus arteriosus. The epicardium was a single layer composed of flattened cells.

참붕어 심장의 조직학적 구조를 광학현미경을 이용하여 관찰하였다. 참붕어의 심장은 정맥동, 심방, 심실 및 동맥구가 연속적으로 배열되어 있었다. 정맥동은 조직학적으로 심내막, 심근층, 심외막층으로 구분되었고, 심방과 심실은 심내막, 심내막하층, 심외막하층 및 심외막으로 구분되었으며, 동맥구는 심내막, 심내막하층, 중간층, 심외막하층 및 심외막으로 구분되었다. 정맥동과 심방, 심방과 심실 및 심실과 동맥구 사이에는 판막이 존재하였다. 정맥동은 대부분 아교질로 구성된 외벽을 가지고 있었으며 정맥동과 심방의 연결부위에는 고리 모양의 조직이 분포하였다. 심방은 얇은 심근층에 의해서 형성된 비연속적인 테두리가 소주들에 의해 형성된 해면성 심근을 둘러싸고 있었고, 심외막하층과 소주에는 아교질이 분포하였다. 심실의 심근층은 해면성 심근으로 이루어져 있고, 심외막하층에는 혈관이 분포하였으며, 심실의 심외막하층과 소주에는 아교질이 분포하였다. 동맥구에서 심내막하층에 의해 형성된 이랑은 직경과 길이가 매우 다양했고, 심내막 세포는 볼록한 모양이었으며, 심내막하층의 세포들은 불규칙한 모양이었으나 무리를 지어 분포하지는 않았다. 중간층의 세포들은 배열방향이 다르게 불규칙한 층을 이루었고, 심외막하층에서는 서로 다른 모양의 세포들이 관찰되었다. 동맥구의 심내막하층, 중간층 및 심외막하층에는 아교질과 탄력소가 풍부하였고, 심외막은 한 층의 편평한 세포들로 이루어져 있었다.

Keywords

References

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