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The branching system is alternate. The polyps are tiny and are supported by a hydrocaulus, a fairly stiff hollow tube with a perisarc (sheath) made of chitin and protein. This is dark brown or blackish, but is often colonised by algae and diatoms giving it a muddy appearance. [2] The whitish polyps are tinged with red.
The hydrocaulus is usually surrounded by a sheath of chitin and proteins called the perisarc. In some species, this extends upwards to also enclose part of the polyps, in some cases including a closeable lid through which the polyp may extend its tentacles. [2] In any given colony, the majority of polyps are specialized for feeding.
The proboscis contains muscles for operating. Each tube is inwardly concave, thus forming a central tube up which moisture is sucked. Suction takes place due to the contraction and expansion of a sac in the head. [6] A specific example of the proboscis being used for feeding is in the species Deilephila elpenor. In this species, the moth hovers ...
Not all questions have simple, yes or no answers—including this one. While many dogs are lactose intolerant, many are not! Lactose intolerance develops as a dog grows up, so it can be impossible ...
Raw feeding is the practice of feeding domestic dogs, cats, and other animals a diet consisting primarily of uncooked meat, edible bones, and organs. The ingredients used to formulate raw diets vary. Some pet owners choose to make home-made raw diets to feed their animals but commercial raw diets are also available.
Because of this, it is important to ensure that puppy diets contain higher amounts of energy than adult dog foods. However, over nutrition associated with feeding ad libitum results in accelerated skeletal growth and weight gain leading to osteopenia, especially in large breed dogs. [8]
Dogs with this kind of cancer that have surgery usually only survive 3 to 18 months, depending on how advanced the cancer is when found (1). Squamous cell carcinoma: This is a good possibility ...
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