Cells have unique characteristics wherein each develop a specific function determined by the activation of certain DNA sequences to generate this specific cell into its supposed design, this is why cell specialization exists.
Hence, these cells can be directly identified with their morphological structures and the DNA sequences they posses.
The natural barriers include biochemical, physical, and mechanical, as well as inflammation of the body.
Natural barriers and the immune system defend the body against the species that leads to infection. The natural barriers include the mucous membranes, skin, earwax, tears, stomach acid, and mucus. Also, the usual flow of urine washes out the microbes, which enter the urinary tract.
Answer:They like to bump their heads against us, sleep in tight boxes, knead our laps, ... It's helpful to look around your house and make sure your cat's area is as safe as possible. For instance, put away things that could get knocked over and keep windows ... If you want to have plants in your home, make sure they are safe for cats.
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