Related Experiment Video

Updated: Jul 23, 2026

RNA In situ Hybridization in Whole Mount Embryos and Cell Histology Adapted for Marine Elasmobranchs
08:13

RNA In situ Hybridization in Whole Mount Embryos and Cell Histology Adapted for Marine Elasmobranchs

Published on: April 12, 2013

Potamotrygon spp.: elasmobranchs with low urea content

T B Thorson, C M Cowan, D E Watson

    Science (New York, N.Y.)
    |October 20, 1967
    PubMed

    More Related Videos

    Raising the Mexican Tetra Astyanax mexicanus for Analysis of Post-larval Phenotypes and Whole-mount Immunohistochemistry06:42

    Raising the Mexican Tetra Astyanax mexicanus for Analysis of Post-larval Phenotypes and Whole-mount Immunohistochemistry

    Published on: December 28, 2018

    Extracellular Multi-Unit Recording from the Olfactory Nerve of Teleosts07:02

    Extracellular Multi-Unit Recording from the Olfactory Nerve of Teleosts

    Published on: October 6, 2020

    Related Concept Videos

    Tonicity in Animals00:59

    Tonicity in Animals

    The tonicity of a solution determines if a cell gains or loses water in that solution. The tonicity depends on the permeability of the cell membrane for different solutes and the concentration of nonpenetrating solutes in the solution within and outside of the cell. If a semipermeable membrane hinders the passage of some solutes but allows water to follow its concentration gradient, water moves from the side with low osmolarity (i.e., less solute) to the side with higher osmolarity (i.e.,...
    Urea Cycle01:23

    Urea Cycle

    The urea cycle describes how liver cells convert ammonia to urea. Ammonia is a toxic waste product of protein catabolism. Land animals must convert ammonia into the less toxic urea which can be safely eliminated by the kidneys through urine. Marine animals excrete ammonia directly, and the surrounding water dilutes the ammonia to safe levels.
    Osmoregulation in Fishes02:32

    Osmoregulation in Fishes

    When cells are placed in a hypotonic (low-salt) fluid, they can swell and burst. Meanwhile, cells in a hypertonic solution—with a higher salt concentration—can shrivel and die. How do fish cells avoid these gruesome fates in hypotonic freshwater or hypertonic seawater environments?
    Comparative Excretory Systems02:24

    Comparative Excretory Systems

    Animals have evolved different strategies for excretion, the removal of waste from the body. Most waste must be dissolved in water to be excreted, so an animal’s excretory strategy directly affects its water balance.
    What Are Osmoregulation and Excretion?02:12

    What Are Osmoregulation and Excretion?

    Organisms must keep bodily fluids at a constant temperature and pH while maintaining specific solute concentrations in order to support life functions. Osmoregulation is the process that balances solute and water levels.