Скачать с ютуб Osmoregulation in marine fishes Lec# 6 в хорошем качестве

Osmoregulation in marine fishes Lec# 6

Osmoregulation in marine water fishes osmoregulation in marine animals | osmoregulation in marine fishes | osmoregulation in saltwater fish Marine: Most marine invertebrates are osmoconformers. Among the vertebrates hagishes are isotonic with the surrounding sea’s water. Most cartilaginous ishes maintain lower, internal salt concentration than that of seawater. Their kidneys for osmoregulation excrete salts through gills and also possess salt excreting organs such as rectal glands. These employ active transport mechanism to remove salt against osmotic gradient. Some ishes have relatively low salts in body luids but have rendered these hypertonic to that of seawater by retaining urea in adequate concentration. Because urea in high concentration is damaging so these ishes retain another chemical trimethylamine oxide(TMAO) for protection against urea. Bony ishes, the descendents of fresh water ancestors but later became marine constantly lose water from their hypotonic body luids to hypertonic environments. These ishes have adapted themselves to drink large amount of seas water and excrete concentrated urine resulting in maximum salt excretion and minimum water loss osmoregulation in marine animals | osmoregulation in marine fish | osmoregulation in saltwater fish OSMOREGULATION IN ANIMALS || CHAPTER 1-HOMEOSTASIS || SECOND YEAR BIO Hypertonic, hypotonic, kidneys, urine, filtration, concentrated urine, dilute urine, urea, trimethylamine oxide, gills, exchange of gasses and salt absorption. Osmoregulation in Animals, Lec4 chapter15 Bio2 Marine and fresh water osmoregulation, Urdu Hindi