• Korean Journal of Ichthyology
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• v.19 no.3
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• pp.201-209
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• 2007

The fine structures and histochemical features on the integumentary system of the grass puffer, Takifugu niphobles were examined by means of the light and transmission electron microscopy. Integumentary surface of the grass puffer showed irregular folds in light microscope. The folds of the ventral region are more pronounced than those in the dorsal region. Integumentary system is composed of outer epidermal layer and inner dermal layer. The stratified epidermal layer consists of epithelia, mucous cells, club cells, granular cells and multivacuolar gland. Epithelial cells are classified into superficial, intermediated and basal cell, and free surface of superficial cell is covered with microridges. Glands of the epidermal layer are divided into unicellular and multicellular gland. Mucous cells of multicellular gland contains mucosal materials of neutral glycoprotein. Multivacuolar gland is composed of numerous vacuole cells of about $20{\mu}m$ in axial diameter. Vacuole cells contains a large central vacuole and are connected to another by many desmosomes. The mucous glands and multivacuolar glands are more abundant in ventral region than dorsal integument. The thickness of dermis is more three to five times than epidermis in ventral integument. The collagen fibers, fibrocytes, nerve cells, basal plate of spine and chromatophore are observed in the dermal layer of compact connective tissue.

• Applied Microscopy
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• v.37 no.1
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• pp.23-33
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• 2007

The lacrimal gland are compound tubule-acinar glands. The main lacrimal function is the production of the aqueous layer, the thickest and major constituent of the precorneal tear film. The lacrimal gland also has an important function in the defense system of the ocular surface, forming a part of the conjunctival-associated hymphoid tissue. The ultrastructural characteristics of the lacrimal gland of the rabbit were described. The lacrimal tissues of rabbits were processed through the conventional techniques for transmission electron microscopy. The secretory portions consisted of three cell types: 1. Serous cells with electron dense secretory granules. 2. Seromucous cells containing variable moderately electron dense secretory granules with flocculent material. 3. Mucous rolls containing mucous secretory granules. The serous cells were situated at the basal portion of acini, and they contained electron dense granules of variable densities and sizes. The seromucous cells contained a few protein secretory granules and more mucous secretory granules. The mucous cells contained even fewer protein secretory granules and exclusively mucous secretory granules. The epithelium of the intralobular ducts showed secretory granules, junctional complexes, and large basolateral intercellular spaces with lateral folds. These study might be helpful in determining inter-relationships, similarities and differences among the orbital glands of various physiological or pathological conditions.

• Korean Journal of Ichthyology
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• v.17 no.4
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• pp.241-247
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• 2005

To observe the respiratory system in relation to the air-breathing organ in Iksookimia longicorpa, micro-anatomical investigation was performed on the epidermis and on intestinal tract fragments. The epidermis was distinguished by two types of skin glands, a small mucous cell and a large club cell. The mucous cell was acid sulfomucins (some sialomucins), but the club cell did not give any histochemical tests for mucosubstances. The presence of a well defined lymphatic system with small lymphocytes was established in the stratum germinativum layer of the epidermis. A large number of blood capillaries run very close to each other just below the basement membrane. The straight intestinal tract is divided into an intestine and rectum, which consisted of a mucosa (epithelial layer), lamina propria-submucosa, muscularis, and serosa. The intestine and rectum have shorter mucosal folds and a thinner wall. The majority of the epithelial mucous cells contain acid sulfomucines. Based on the above results, I. longicorpa adapts to poor dissolved oxygen conditions by using an additional respiratory system using air through the epidermis, not the intestines.

• Korean Journal of Ichthyology
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• v.20 no.2
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• pp.90-96
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• 2008

The histological morphology on the skin of Misgurnus anguillicaudatus was described in the three regions such as dorsal, lateral, occiput and subsequently morphological variations of the skin were monthly observed for a year. The skin consisted of epidermis having epithelial cell, club cell and mucus cell, and dermis of mainly connective tissue fiber, embedded scale and blood capillary. Unicellular mucus cells situated at the epidermis underwent seasonal change in its size, as well as number and amounts of mucus-secreting materials, which they greatly increased in winter, but did not in summer. As it is getting cold, the mucus cells' shape changed from initial spherical to oval or elongated form. Such considerable changes in the mucus cell were particularly most evident in the occiput during winter. Moreover, the dermis largely thickened about 2~3 times in winter than in summer. Based on these results, we discussed function for the mucus on what it mainly acts in nature and information on whether mucus cells' seasonal variations affect on hibernation and cutaneous respiration.

• Applied Microscopy
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• v.34 no.2
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• pp.131-137
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• 2004

This study is observed the skin of the parrot fish, Oplegnathus fasciatus that related study of epidermal alternation with environmental and physiological change. It composed of supporting cells, unicellular glands and accessory cells. The supporting cells are classified into superficial cell, intermediated cell and basal cell. Superficial cell of epidermal layer is squamous or cuboidal and contain nucleus of ovoid type. And its free surface has many microridge which covered with glycocalyx. Intermediated cell is ovoid and has a nucleus of round shape. Basal cell is columnar, and nucleus is situated in the upper cytoplasm. Gland cells are classified into mucous cell and club cell. By the histochemical studies of the epidermal secretions the mucous materials react on blue in ABPAS (pH 2.5). Club cell is observed numerous vacuoles and microfilaments in the cytoplasm. The cytoplasm of chloride cells are occupied with numerous mitochondria. Pigment cells are classified into two type. The one contain pigment granules of electron dense, and the other contain reflecting platelets.

• Journal of the Korean Society of Radiology
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• v.84 no.5
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• pp.1066-1079
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• 2023

Purpose Distinguishing intradural extramedullary (IDEM) spinal ependymoma from myxopapillary ependymoma is challenging due to the location of IDEM spinal ependymoma. This study aimed to investigate the utility of clinical and MR imaging features for differentiating between IDEM spinal and myxopapillary ependymomas. Materials and Methods We compared tumor size, longitudinal/axial location, enhancement degree/pattern, tumor margin, signal intensity (SI) of the tumor on T2-weighted images and T1-weighted image (T1WI), increased cerebrospinal fluid (CSF) SI caudal to the tumor on T1WI, and CSF dissemination of pathologically confirmed 12 IDEM spinal and 10 myxopapillary ependymomas. Furthermore, classification and regression tree (CART) was performed to identify the clinical and MR features for differentiating between IDEM spinal and myxopapillary ependymomas. Results Patients with IDEM spinal ependymomas were older than those with myxopapillary ependymomas (48 years vs. 29.5 years, p < 0.05). A high SI of the tumor on T1W1 was more frequently observed in IDEM spinal ependymomas than in myxopapillary ependymomas (p = 0.02). Conversely, myxopapillary ependymomas show CSF dissemination. Increased CSF SI caudal to the tumor on T1WI was observed more frequently in myxopapillary ependymomas than in IDEM spinal ependymomas (p < 0.05). Dissemination to the CSF space and increased CSF SI caudal to the tumor on T1WI were the most important variables in CART analysis. Conclusion Clinical and radiological variables may help differentiate between IDEM spinal and myxopapillary ependymomas.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2000.05a
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• pp.513-515
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• 2000

타액선을 구성하는 선세포의 종류는 달팽이의 종류에 따라 다양하게 나타났던 바, Walker(1970)는 병안목(Agriolimax reticiulatus)의 타액선을 광학현미경을 이용하여 2개의 성점액세포와 7개의 중성 및 장액성세포 그리고 1개의 순수한 장액세포 등 모두 10개의 세포를 관찰한 바 있고, Mclean(1970)은 Haliotis rufescens를 재료로 한 실험에서 타액선을 성하는 선세포는 오직 점액세포(mucous Cell) 한 종류뿐이 란 보고도 있었다. (중략)

• Korean Journal of Ichthyology
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• v.13 no.1
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• pp.24-27
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• 2001

The barbel structure of the spined loach Iksookimia longicorpa were investigated histologically. Their barbels consist of epidermis, dermis, and a central rod. The epidermis contains mucous cells, terminal buds, granular cells, and epidermal cells. The mucous cells are thin rims of basophilic cytoplasm and are located at the surface of the epidermis. The terminal bud is basophilic and is situated at the distal portion of the epidermis. The dermis consists of loose connective tissue containing blood vessels, pigment cells, and nerve cells. The central region of cartilage is the innermost region and is enclosed within muscle layers.

• The Korean Journal of Zoology
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• v.23 no.2
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• pp.77-88
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• 1980

The ultrastructures of the mucous glands in the Asiatic land salamander (Hynobius leechi) skin were observed by means of electron microscope. The results were as follows; 1. The mucous gland of the Asiatic land salamander skin consisted of a body of gland and a duct. The body of gland consisted of the glandular epithelial and the myoepithelial cells. 2. The light, the dark, the mitochondria-rich, the endoplasmic reticulum-developed, the secretory granule-containing and the vesiculated cells were observed in the mucous glandular epithelium. 3. It is supposed that the light, the dark and the mitochondria-rich cells are undifferentiated cells, the endoplasmic reticulum-developed cell is pre-secretory cell, the secretory granule-containing cell is mature cell and the vesiculated cell is evacuated cell.

• Proceedings of the Zoological Society Korea Conference
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• 1999.10b
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• pp.164.1-164
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• 1999