Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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The Structure of the Ventricle in the Heart of the Pond Smelt, Hypomesus nipponensis (Osmeridae)

바다빙어과 빙어 (Hypomesus nipponensis)의 심실 구조

  • Received : 2015.06.08
  • Accepted : 2015.09.25
  • Published : 2015.09.30
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Abstract

The structure of the ventricle in the heart of Hypomesus nipponensis was investigated by light and scanning electron microscope. The heart consisted of four consecutive chambers, the sinus venosus, atrium, ventricle and bulbus arteriosus. The wall of the ventricle was divided into endocardium, myocardium, subepicardium and epicardium. The valves were observed in the artrioventricular and bulboventricular junctions. The ventricular myocardium was an entirely spongy without coronary vessels. The trabecular network was formed with lumina included a central lumen and the trabecula was cylindrical shape. Collagen distribution was apparent in the subepicardium, artrioventricular valve and bulboventricular valve. But in the trabeculae, collagen distribution was observed partly in the base of the ventricle. Especially, the endocardial bridges were observed between trabeculae. These results might be considered that the structure of the ventricle in the heart of pond smelt is adapted to sedentary habit associated with its habitat and lifestyle.

빙어의 심실 구조를 광학현미경과 주사전자현미경으로 관찰하였다. 빙어의 심장은 정맥동, 심방, 심실 및 동맥구가 연속적으로 배열되어 있었다. 심실의 외벽은 심내막, 심근층, 심외막하층 및 심외막으로 구분되었고, 심방과 심실 사이의 방실판막 및 심실과 동맥구 사이의 구실판막이 관찰되었다. 심실은 주머니 모양이었으며, 심근층은 해면성 심근으로만 구성되어 있었고 관상혈관은 분포하지 않았다. 심실에서 소주들은 중심 내강과 작은 내강들을 형성하였으며, 소주는 원기둥 모양이었다. 심외막하층, 방실판막 및 구실판막에서 아교질의 분포가 관찰되었으나 소주에서는 심실의 기저부에서 부분적으로 관찰되었다. 특히 소주들 사이에서는 심내막교가 관찰되었다. 이와 같은 결과는 육봉형 빙어가 서식환경 및 생활양식에 적응한 결과로 생각된다.

Keywords

References

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