أضاءات

منذ 11 ساعة نشر في ٢٠٢٦/٠٥/٢٠ م

Mature adults of some salamander species have "nuptial" glandular tissue in their cloacae, at the base of their tails, on their heads or under their chins. Some females release chemical substances, possibly from the ventral cloacal gland, to attract males, but males do not seem to use pheromones for this purpose.

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منذ 14 ساعة نشر في ٢٠٢٦/٠٥/٢٠ م

Imam Ali (PBUH) said: Do not become obstinate (and do not strictly follow your own ideas), because such a one will meet destruction.

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منذ 1 أيام نشر في ٢٠٢٦/٠٥/١٩ م

Some salamander toxins are particularly potent. For example, the rough-skinned newt (Taricha granulosa) produces the neurotoxin tetrodotoxin, the most toxic nonprotein substance known. Handling the newts does no harm, but ingestion of even a minute fragment of skin is deadly. In feeding trials, fish, frogs, reptiles, birds, and mammals were all found to be susceptible.

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منذ 1 أيام نشر في ٢٠٢٦/٠٥/١٩ م

Imam Ali (PBUH) said: How many wretched people there are whose days are being numbered but yet they are laboriously seeking wealth.

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منذ 3 أيام نشر في ٢٠٢٦/٠٥/١٨ م

Glands in the skin discharge mucus which keeps the skin moist, an important factor in skin respiration and thermoregulation. The sticky layer helps protect against bacterial infections and molds, reduces friction when swimming, and makes the animal slippery and more difficult for predators to catch. Granular glands scattered on the upper surface, particularly the head, back, and tail, produce repellent or toxic secretions.

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منذ 3 أيام نشر في ٢٠٢٦/٠٥/١٨ م

Imam al-Sadiq (PBUH) said: He who devotes his heart to this world will be subjected to three conditions: endless grief, unquenchable desire, and futile hope.

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منذ 3 أيام نشر في ٢٠٢٦/٠٥/١٧ م

Imam al-Sadiq (PBUH) said: If a son of Adam possessed two vast valleys wherein gold and silver flowed, he would still wish to search for the third one.

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منذ 4 أيام نشر في ٢٠٢٦/٠٥/١٦ م

When the front limbs have been worked clear, a series of body ripples pushes the skin toward the rear. The hind limbs are extracted and push the skin farther back, before it is eventually freed by friction as the salamander moves forward with the tail pressed against the ground. The animal often then eats the resulting sloughed skin.

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منذ 5 أيام نشر في ٢٠٢٦/٠٥/١٦ م

Imam Ali (PBUH) said: Even though miserliness, cowardice and greed are different qualities, yet they are common in having an incorrect idea about Allah.

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منذ 5 أيام نشر في ٢٠٢٦/٠٥/١٥ م

The skin of salamanders, in common with other amphibians, is thin, permeable to water, serves as a respiratory membrane, and is well-supplied with glands. It has highly cornified outer layers, renewed periodically through a skin shedding process controlled by hormones from the pituitary and thyroid glands. During moulting, the skin initially breaks around the mouth, and the animal moves forward through the gap to shed the skin.

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منذ 6 أيام نشر في ٢٠٢٦/٠٥/١٤ م

The tail is used in courtship and as a storage organ for proteins and lipids. It also functions as a defense against predation, when it may be lashed at the attacker or autotomized when grabbed. Unlike frogs, an adult salamander is able to regenerate limbs and its tail when these are lost.

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منذ 1 أسابيع نشر في ٢٠٢٦/٠٥/١٣ م

In the families Ambystomatidae and Salamandridae, the male's tail, which is larger than that of the female, is used during the amplexus embrace to propel the mating couple to a secluded location. In terrestrial species, the tail moves to counterbalance the animal as it runs, while in the arboreal salamander and other tree-climbing species, it is prehensile. The tail is also used by certain plethodontid salamanders that can jump, to help launch themselves into the air.

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