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40 results for “gland morphology”
FIGURE 1 in Morphological and immunohistochemical comparison of the pituitary gland between a tropical Paracheirodon axelrodi and a subtropical Aphyocharax anisitsi characids (Characiformes: Characidae)
FIGURE 1 | Microphotographs of sagittal sections of the pituitary gland of Paracheirodon axelrodi. A. Stained with Haematoxylin-Eosin (H-E), C. Masson trichrome (MT), and E. Periodic acid-Schiff (PAS). Microphotographs of sagittal sections of the pituitary gland of Aphyocharax anisitsi. B. Stained with H-E, D. MT, and F. PAS. RPD: rostral pars distalis; PPD: proximal pars distalis; PI: pars intermedia; NH: neurohypophysis.
FIGURE 7 in Morphological and immunohistochemical comparison of the pituitary gland between a tropical Paracheirodon axelrodi and a subtropical Aphyocharax anisitsi characids (Characiformes: Characidae)
FIGURE 7 | Camera lucida drawings of sagittal sections of the pituitary gland, obtained by histological and immunohistochemical analysis, showing the distribution of adenohypophyseal cells of P. axelrodi A. and A. anisitsi B.. RPD: rostral pars distalis; PPD: proximal pars distalis; PI: pars intermedia; NH: neurohypophysis. () prolactin cells; () adrenocorticotropin cells () growth hormone; (Ê) gonadotropin cells; () somatolactin cells; (+) melanotropin cells.
FIGURE 4 in Morphological and immunohistochemical comparison of the pituitary gland between a tropical Paracheirodon axelrodi and a subtropical Aphyocharax anisitsi characids (Characiformes: Characidae)
FIGURE 4 | Microphotographs of sagittal sections in the pituitary gland of Paracheirodon axelrodi showing the location of PRL- A. and ACTH- C. ir from the RPD and MSH- C. and SL- F. ir from the PI. Gray box shows the area of detail microphotographs. Details of PRL- B. and ACTH- D. ir from the RPD and MSH- E. and SL- G. ir from the PI. ACTH: adrenocorticotropic hormone; Black star: neurohypophysis; MSH: melanocyte-stimulating hormone; PI: pars intermedia; PPD: proximal pars distalis; PRL: prolactin; RPD: rostral pars distalis; SL: somatolactin.
FIGURE 3 in Morphological and immunohistochemical comparison of the pituitary gland between a tropical Paracheirodon axelrodi and a subtropical Aphyocharax anisitsi characids (Characiformes: Characidae)
FIGURE 3 | Microphotographs of sagittal sections in the pituitary gland of Aphyocharax anisitsi showing the location of PRL- A. and ACTH- C. ir from the RPD and MSH- C. and SL- F. ir from the PI. Gray box shows the area of detail microphotographs. Details of PRL- B. and ACTH- D. ir from the RPD and MSH- E. and SL- G. ir from the PI. ACTH: adrenocorticotropic hormone; Black star: neurohypophysis; MSH: melanocyte-stimulating hormone; PI: pars intermedia; PPD: proximal pars distalis; PRL: prolactin; RPD: rostral pars distalis; SL: somatolactin.
FIGURE 2 in Morphological and immunohistochemical comparison of the pituitary gland between a tropical Paracheirodon axelrodi and a subtropical Aphyocharax anisitsi characids (Characiformes: Characidae)
FIGURE 2 | Details of various components of the pituitary gland of Paracheirodon axelrodi and Aphyocharax anisitsi. Microphotographs of sagittal sections of the A. RPD, B. PPD in P. axelrodi and C. PPD and D. PI in A. anisitsi stained with Haematoxylin-Eosin (H-E). Microphotographs of sagittal sections of the E. PPD and F. PI of P. axelrodi and G. PPD and H. PI in A. anisitsi stained with periodic acid-Schiff (PAS). The delimited gray area corresponds to the neurohypophysis. Black arrowhead: blood vessel; RPD: rostral pars distalis; PPD: proximal pars disalis; PI: pars intermedia. Bars = 10µm.
Figure 19. Anelosimus eximius. A, epiandrous gland spigots. B in Morphological phylogeny of cobweb spiders and their relatives (Araneae, Araneoidea, Theridiidae)
Figure 19. Anelosimus eximius. A, epiandrous gland spigots. B, epigynum; note ridges on epigynal plate (arrows, 3-1). C, prolateral cheliceral margin. D, retrolateral cheliceral margin. E, male fourth tarsal claws. F, female prosoma. Scale bars: A, C–E, 20 Mm; B, 50 Mm; F, 100 Mm.
Figure 3 in Morphology of the arthrodial membrane gland in a Neotropical harvester (Arachnida: Opiliones)
Figure 3. Sagital sections through an arthrodial membrane of the coxa-trochanter articulation of a leg IV in a male harvester Mischonyx squalidus: (A) arthrodial membrane cuticle (AM) and cuticle (sclerite cuticle) (c); (B) arthrodial membrane and basal membrane of secretory cells; (C) secretory cells (sc) with glandular prismatic cells (black arrows), granules (gray arrows) and cuticular canals (cc) stained with hematoxylin and eosin. (bm) Basal membrane, (ci) cytoplasm, (Fo) folds, (n) nucleus.
Figure 5 in Morphology of the arthrodial membrane gland in a Neotropical harvester (Arachnida: Opiliones)
Figure 5. Interior of a prismatic cell in the arthrodial membrane of the coxa – trochanter articulation of a leg IV in a male harvester Mischonyx squalidus: (A) smooth endoplasmic reticulum (ser); (B) mitochondrion (circle) and granules (gray arrows).
Figure 1 in Morphology of the arthrodial membrane gland in a Neotropical harvester (Arachnida: Opiliones)
Figure 1. External morphology of a male harvester Mischonyx squalidus: (A) dorsal view. The anterior region is on the right, legs I, II and III were removed. The square shows the arthrodial membrane in the leg IV and the pore plate (pp); (B) regions with folds (Fo) and without folds; (B–D) show increasing zoom of the pore plate, a region without folds. Arrows show pores.
Figure 2 in Morphology of the arthrodial membrane gland in a Neotropical harvester (Arachnida: Opiliones)
Figure 2. Sections through an arthrodial membrane of the coxa (CX) - trochanter (TR) articulation of a leg IV in a male harvester Mischonyx squalidus: (A) frontal longitudinal section; (B) transversal section between the coxa and the trochanter of leg IV. (AM) Arthrodial membrane, (c) cuticle (sclerite cuticle), (m) muscle.
Figure 4 in Morphology of the arthrodial membrane gland in a Neotropical harvester (Arachnida: Opiliones)
Figure 4. Sagital sections through an arthrodial membrane of the coxa-trochanter articulation of a leg IV in a male harvester Mischonyx squalidus: (A) staining with bromophenol blue; (B) staining with PAS. (AM) Arthrodial membrane, (SC) secretory cells, (cc) cuticular canals.
Morphology of parotoid glands in cane toads
<p>If optimal investment in anti-predator defences depends on predation risk, invading new regions (and thus, encountering different predators) may favour shifts in that investment. Cane toads offer an ideal system to test this prediction: expensive anti-predator toxins are stored mainly in parotoid glands whose dimensions are easy to measure, and toad invasions have changed the suites of predators they encounter. Although plasticity may influence parotoid morphology, comparisons between parents and progeny revealed that gland dimensions were highly heritable. That heritability supports the plausibility of an evolved basis to variation in gland dimensions. Measurements of 3,779 adult toads show that females have larger glands than males, invasive populations have larger glands than in the native-range, and that parotoid sexual size dimorphism varies strongly among invaded areas. Geographic variation in parotoid morphology may be driven by predation risk to both adult toads and offspring (provisioned with toxins by their mother), with toxins allocated to eggs exacerbating the risk of cannibalism but reducing the risk of interspecific predation. Investment into chemical defences has evolved rapidly during the cane toad's international diaspora, consistent with the hypothesis that organisms flexibly adjust resource allocation to anti-predator tactics in response to novel challenges.</p>
FIGURE 10. Spionid adult morphology. Epithelial glands. A in Spionidae (Annelida) from shallow waters around the British Islands: an identification guide for the NMBAQC Scheme with an overview of spionid morphology and biology
FIGURE 10. Spionid adult morphology. Epithelial glands. A, Polydora cornuta, neuropodia of segments 6–8, left lateral view, external extensions of secretory cells of glandular pouches situated anterior and ventral to vertical row of hooded hooks. B, Boccardia sp., neuropodia of segments 7–8, left lateral view, external extensions of secretory cells of glandular pouches situated anterior, posterior and ventral to vertical row of hooded hooks. C, Spiophanes sp., segments 4–7, left lateral view, enlarged neuropodial postchaetal lamellae on segments 5–7 with ornamented fiber spreaders (openings of fiber glands) in shape of flying bird. D, Spiophanes sp., segments 11–15, left lateral view, enlarged neuropodial postchaetal lamellae with slit-like openings of fiber glands (fiber spreaders) with protruding hardened secretion. E, Spio sp., anterior segments, ventral view, small paired ventral pores arranged in transverse line on each segment. F, Polydora cornuta, pygidium, rear view, numerous external extensions of epithelial glandular cells with protruding hardened secretion appearing as numerous spicules. an—anus; fs—fiber spreader; gc—external extension of glandular cell; hh—hooded hook; ic—ventral inferior capillary; lo—lateral ciliated organ; ne—neuropodial postchaetal lamella; no—notopodial postchaetal lamella; s5–s7—segments 5–7; s12–s15— segments 12–15; sa—ventral inferior sabre chaeta; se—hardened secretion protruding from fiber spreader; vp—ventral pore. Scales: A, F—20 µm. B–E—50 µm.
Fig. 23. Metapleural gland opening, left lateral view. A. Aneuretus simoni. B. Myrmica americana. C in A phylogenetic analyis of ant morphology (Hymenoptera: Formicidae) with special reference to the poneromoprh subfamilies
Fig. 23. Metapleural gland opening, left lateral view. A. Aneuretus simoni. B. Myrmica americana. C. Prionopelta antillana. Abbreviations: a, ventral flap projection; Pl3, metapleuron; Pl3G, metapleural gland opening; IT, propodeum; IIT, tergum of petiole.
Datasets for "Individual and environmental factors influencing preen gland's morphology and physiology in the barn owl (Tyto alba)"
<p><span>Avian preen gland helps birds cope with their environment, although its overall functioning remains unclear. We shed light on the complexity of the preen gland’s functioning by studying how multiple factors associate with gland morphology (size and shape) and physiology (wax secreted) in barn owls (<em>Tyto alba</em>). Individual factors (sex, breeding stage, body condition) were more important predictors of preen gland than environmental factors (temperature, humidity, brood size). Sex, depending on breeding stage in adults, influenced preen gland traits, pointing to the preen gland’s regulation by sex hormones and a greater pressure on females to protect their eggs, offspring and themselves throughout reproduction. Adults and fledglings in better condition had larger glands, pointing to the existence of physiological costs. Temperature and humidity, in interaction with plumage coloration, also influenced but to a lesser extent preen gland traits, suggesting that melanin pigmentation and preen gland act as superseding mechanisms when protecting plumage against microorganisms. Finally, fledglings living in larger broods had larger glands, suggesting a role for the social environment in preen gland’s functioning. Overall, our study supports the idea that preen gland functions in diverse biological contexts within the same species and is thus subject to multiple selective pressures.</span></p>
Fig. 1 in Morphology of the pronotal compound glands in Tritoma bipustulata (Coleoptera: Erotylidae)
Fig. 1 SEM pictures of compound glands of two Erotylinae species. a–g Pronotal glands of Tritoma bipustulata after treatment with KOH. a Ventral view of inside of right half of pronotum, anterior corner of pronotum to the right. b Position of gland opening corresponds with position of externally visible pore (arrow). c Overall view of a branched gland (arrow). d, e Piece of main excretory duct (ed) of gland bearing glandular ductules (gd) and smaller lateral appendices (la) originating from base of glandular ductules (unlabeled arrows). f Base of a glandular ductule (gd), with constriction (gdc) and origin of lateral appendix (la); the cuticular filaments of lateral appendix embrace the base (unlabeled arrow). g Pieces of two glandular ductules (gd), showing their spongiose surface. h Prosternal gland of T. bipustulata. i Overall view of pronotal gland of Triplax scutellaris. Scale bars in µm
Fig. 4 in Morphology of the pronotal compound glands in Tritoma bipustulata (Coleoptera: Erotylidae)
Fig. 4 SEM pictures showing tubules of dermal glands of four different types found in Tritoma bipustulata (after treatment with KOH). a Tubule with smooth dilatation followed distally by a narrow part. b Tubule with smooth dilatation and without a narrow part
Effect of HMG-CoA Reductase Inhibitors on the Meibomian Gland Morphology in Patients With Meibomitis
ClinicalTrials.gov study NCT04085016. IPD Sharing: NO. Countries: 1. Publications: 3.
Morphological Analysis of Meibomian Glands
ClinicalTrials.gov study NCT04052841. IPD Sharing: YES. Countries: 1. Publications: 14.
Morphology of parotoid glands in cane toads
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