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2 edition of Comparative studies on the cranial glands of turtles, with special reference to salt secretion. found in the catalog.

Comparative studies on the cranial glands of turtles, with special reference to salt secretion.

Freeman Brian Matthew Cowan

Comparative studies on the cranial glands of turtles, with special reference to salt secretion.

  • 352 Want to read
  • 19 Currently reading

Published in Toronto .
Written in English

  • Glands,
  • Secretion,
  • Turtles -- Anatomy

  • Edition Notes

    ContributionsToronto, Ont. University.
    The Physical Object
    Paginationx, 202 leaves.
    Number of Pages202
    ID Numbers
    Open LibraryOL18951272M

    dripping from their beaks from nasal glands similar to salt glands in turtles from BISC at University of Southern California.   Okay, now to your problem of the salt glands. The blood contains salt that would be problematic and needs to be reomved. The artery runs through the gland starting at a very high concentration of salt. The exchange tissue are cells, which take up the salt . Human Anatomy and Physiology Course Guide and Lab Manual - Bronx Community College of The City University of New York Editor: Carlos Liachovitzky

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Comparative studies on the cranial glands of turtles, with special reference to salt secretion. by Freeman Brian Matthew Cowan Download PDF EPUB FB2

J Morphol. Oct;(2) The homology of cranial glands in turtles: with special reference to the nomenclature of salt glands. Cowan by:   Cowan FBM () Comparative studies on the cranial glands of turtles, with special reference to salt secretion.

Ph D thesis, University of Toronto, Toronto, Canada Google Scholar Cowan FBM (a) Observations on extra-renal excretion by the orbital glands, and osmoregulation in Malaclemys by: 8.

COWAN F. () Comparative studies on the cranial glands of turtles, with special reference to salt secretion. thesis, University of Toronto, Toronto, Canada. COWAN F.

() The ultrastructure of the lachrymal 'salt' gland and the Harderian gland in the euryhaline Malaclemys and some closely related emydines. Can. by: 5. COWAN F. () Comparative studies on the cranial glands of turtles with special reference to salt secretion.

Ph.D. thesis, University of Toronto, Toronto, Canada. COWAN F. () Observations on extrarenal excretion by the orbital glands, and osmoregulation in Malaclemys by: 4.

Anatomical study Both glands were positioned retroperitoneal and embedded in a mass of fat located in the abdominal cavity cranial to the cranial pole of the kidney. The distance between the right adrenal gland and its related right kidney was lesser than the distance present between the left gland and the left maybe to.

Embryological studies of species with oral salt glands are also lacking. The lingual salt glands of crocodilians are reported to develop from the dorsal epithelium of the tongue (Ferguson ), but no other data on the generation of the secretory tubules or the onset of secretory-cell identity are available.

Comparative studies of lingual-gland development in alligators (or gavials) and crocodiles, with special Cited by: A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text.

The orbital glands of the terrapin Pseudemys scripta in response to osmotic stress: A light and electron microscope study. The histochemical and ultrastructural features of both orbital glands--the anterior lacrimal and harderian glands--were compared in the terrapin Pseudemys scripta following adaptation either to distilled water or to seawater.

Start studying anatomy practice exam 3. Learn vocabulary, terms, and more with flashcards, games, and other study tools. The cranial nerve that passes through the cribriform plate of the ethmoid bone is the _____ nerve.

The secretion of the ceruminous glands forms a: Cerumen with sebum and exfoliated keratinocytes b: Cerumen, which is. In all lizards the salt gland is the nasal gland; secretions pass from the nasal passage out through the external nares 1,3,4.

In turtles, salt gland secretion elaborated by the Harderian gland is discharged under the eyelid 1. Crocodiles may have a. Papers on salt glands are scattered through a great many different journals. There is therefore a great need for a synthesis of what is known about salt glands.

The means by which salt glands perform their vital function of forming and excreting a concentrated salt solution is of great biological importance in 5/5(1). The salt (lacrimal) gland (Figs.

81 and ) is the largest gland in the head and is found dorsal and medial to the eye. These glands are large in all sea turtles, but are especially hypertrophied in Dermochelys (Fig.

The salt gland is responsible for removal of excess salt from the body. Anterior to the eye, there is a small HarderianFile Size: 2MB.

Using two independent techniques, histochemistry and autoradiography, an enzyme (E.C. ) has been localized on basolateral cell membranes of salt secreting cells in the lachrymal gland of Malaclemys. This enzyme is ouabain by: 5. studies. The present study was targeted to form the baseline data of normal morphological features of thyroid and parathyroid glands in adult mongooses.

Six adult mongooses (3 males and 3 females) were used to study these glands macroscopically. This study revealed that thyroid gland File Size: KB. Salt glands: Like other marine reptiles, sea turtles rely on a specialized gland to rid the body of excess salt ions, because reptilian kidneys cannot produce urine with a higher ion concentration.

Full text of "The Glands regulating personality: A Study of the Glands of Internal Secretion in Relation to " See other formats. environmental constraints and salt-gland function in tetrapods. Distribution and nomenclature of salt glands in tetrapods Although there are many glands present in the head of the idealized tetrapod (Fig.

1A), only one (or one pair, for paired glands) is the salt gland in any given taxon (Fig. 1B). The anatomical position of the saltCited by: Book Description: In what is certain to be the key reference on iguanas for years to come, some of the world's leading experts offer a clear and accessible account of the latest research on the evolution, behavioral ecology, and conservation of these highly visible and increasingly endangered creatures, much loved by professional herpetologists and hobbyists alike.

Comparison of Salt Glands in Marine Animals - ANM Comparative Physiology Task 2 Sea Turtles | National Do pelicans have nostrils. - nasal salt glands - Duration: "Comparative descriptions of the cranial morphology in living and extinct turtles are presented in this paper.

Descriptions are arranged by bone rather than by taxon and attempt to document the types and degrees of differences in cranial structures within the Testudines, emphasizing features of. Comparative histomorphological study of the pineal gland in human and fowl B. Pal 1*, A.K. Ghosal 2, Some special stains were used to observe connective tissue elements (Reticulin,collagen and elastic fibers) along with conventional H and E Pineal gland, comparative histology, man, fowl.

Introduction. tion and causes secretion from a number of glands. It was therefore of interest to compare the stimulation by mecholyl in the pelican with its effect on gulls. Mecholyl was injdcted intravenously in amounts of from mg to mg per kg body weight.

Secretion from the salt glands as well as secretion of tear fluid started immediately and con-File Size: KB. Cowan FB. The ultrastructure of the lachrymal 'salt' gland and the Harderain gland in the euryhaline Malaclemys and some closely related stenohaline emydines.

Can J Zool. May; 49 (5)– Cowan FB. The homology of cranial glands in turtles: with special reference to the nomenclature of salt glands.

J Morphol. Oct; (2)–Cited by: Full text of "Biology of the vertebrates: a comparative study of man and his animal allies" See other formats. Salt Gland Function in the Green Sea Turtle Chelonia Mydas Citations Introduction -Marine vertebrates (excluding mammals) have insufficient kidney function to regulate osmolarity -Early evidence from marine birds, whose salt glands excrete extremely high amounts of NaCl.

--regulates secretion of tear, lacrimal and 2 salivary glands-glossopharyngeal (IX)--regulates parotid salivary gland-vagus nerve (X)--muscles and glands of the. You may be curious about how a sea turtle is able to process all the salt that it ingests from the salt water it lives in.

Sea turtles have special glands near their tear ducks called lachrymal glands. These glands excrete excess salt in their bodies so the animal doesn’t get dehydrated. The important glands are the hypothalamus, anterior and posterior pituitary, adrenal glands, pineal gland, thyroid, parathyroid, thymus, pancreas, and ovaries/testes.

The hypothalamus is the control center of the endocrine system because it sends and receives chemical signals from various parts of the body when a hormone is needed or not needed. Very little is known about the cranial exocrine glands of the head in bats. Two main groups of such glands are those in the facial and orbital regions (Fig.

1).Some information is available about the relative development of facial glands in bats (Quay, ; Kulzer et al., ; Haffner,), though most of this literature focuses on the glands in the mandibular region (chin, gular Cited by: The salt gland is an organ for excreting excess is found in elasmobranchs (sharks, rays, and skates), seabirds, and some reptiles.

Sharks' glands are found in their rectum, birds' and reptiles' in or on the skull in the area of the eyes, nostrils or glands are lobed containing many secretory tubules which radiate outward from the excretory canal at the center. Salt Secretion: (Eckert ) active Down electrochemical gradient (Paracellular) recycle 25 Figure in Box Hill et al.

Chloride Cell 26 Salt Glands Shark rectal glands to dispose of excess NaCl-blood hyperosmotic to seawater, but less salt-more urea and TMAO (trimethylamine oxide) -NaCl actively secreted 27 Shark Rectal Salt GlandsFile Size: KB.

COMPARATIVE MORPHOLOGICAL AND ANATOMICAL STUDY ON THYMUS GLAND OF HUMAN AND PRIMATE. traceable and is much made of connective tissue without the parenchyma.

It is a much attenua-ted organ, but during foetal stage it is a well-developed and functional organ. Though elaborate work has been done on the thymus gland, information available regarding.

Cranial salt glands are only known to exist in birds and modern reptiles. Therefore it is the reptiles to which we must concentrate most of our attentions. Nasal glands probably first appeared in the Amphibia serving to moisten and cleanse the nasal passages of the.

Fortunately, the marine iguana has another way to get rid of salt without wasting a lot of its precious water.1 Most of the salt from the bloodstream collects in a special gland, located above the eyes, and the marine iguana sneezes the salty fluid out.2 The spray then falls back onto the iguana’s head where it rapidly evaporates, often.

Comparative studies indicate that differences exist in the structure and function of digestive tubes among carnivores, omnivores and herbivores, and that morphological variations are governed by differences in diet (Grady et al.

The morphology of the digestive tube of sea turtles is adapted to the feeding habits of the species. Feeding movements in many bony fishes -> cranial kinesis (see Figurep of text) Cranial kinesis: movement between the upper jaw and braincase; advantages: provides a way to change the size and configuration of the mouth rapidly; optimize biting and rapid feeding.

turtles with other chelonians or reptiles in gen-eral, but in most there are not. Where possible we will attempt to compare sea turtle species to each other.

The sea turtles exhibit several extreme ad-aptations associated with reproduction: long mi-grations, large body size and great age to sexual maturity.

By studying the physiology and be. Mouth: Cavity inside thewater, and air enter the body through the mouth. (2) Esophagus: Long, narrow tube that connects the mouth with the stomach.(2) Liver: Viscera that produces bile, bile helps digestion.(1) Stomach: Tubular digestive organ, which receives food to be digested.(1) Gall Bladder: The small sac-shaped organ beneath the liver, It holds and releases bile from the.

Cambridge Core - Zoology - Vertebrate Ecophysiology - by Don Bradshaw. Ecophysiology attempts to clarify the role and importance of physiological processes, such as digestion and respiration, in the ecological relations of species in their natural habitats.

The Special Senses •A sensation is the conscious or subconscious awareness of an internal or external stimulus •Receptors for the special senses of smell, taste, vision, hearing, and equilibrium are anatomically distinct from one another and are concentrated in specific locations in the head •There are specific afferent pathways and.

Reptiles are tetrapod animals in the class Reptilia, comprising today's turtles, crocodilians, snakes, amphisbaenians, lizards, tuatara, and their extinct study of these traditional reptile orders, historically combined with that of modern amphibians, is called herpetology.

Because some reptiles are more closely related to birds than they are to other reptiles (e.g., crocodiles Clade: Sauropsida.“Chloride-secreting cells” in the gills of fishes with special reference to the common eel. J Physiol Lond –, Crossref Google Scholar; 69 Kirschner LB.

The mechanism of sodium chloride uptake in hyperregulating aquatic animals. J Exp Biol –, Crossref PubMed ISI Cited by: Hatchling L. kempi possess five Rathke's gland orifices along the inframarglnal scutes, and one in inguinal region.

The shell of the turtles was wiped with a paper towel to remove algae before secretions were collected. Secretion discharge was elicited by wiping the plastral ridge with.