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Q. Is the epithelium vascularized? How do oxygen and nutrients reach the epithelium? Why is this feature an important evolutionary acquisition?
Epithelia are not vascularized capillaries don't directly reach their cells the epithelium exchanges substances by diffusion with the connective tissue situated under it.
Since the epithelia are not vascularized minuscule scratches or skin injuries that happen all the time do not trigger bleeding and do not expose the blood to contamination from external agents this is an important protective strategy discovered by evolution.
Q. How to investigate mitral regurgitation by Chest Radiogram? Enlarged left atrium is obvious on chest X-ray and it may occupy most of the cardiac silhouette in patients with
Q. Does pH affect the enzyme activity? The concentrations of hydrogen ions in solution affect the enzyme activity. Each enzyme has utmost efficiency under an optimum p H . S
What are the three parts of a DNA nucleotide, and how are they connected to each other? The three types are a deoxyribose sugar, a phosphate group, and a nitrogenous base. The
An osteoclast is a type of bone cell that absorbs bone tissue by removing its mineralized matrix and breaking up the organic bone. This process is known as bone resorption
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what is exonephric
A v i a n leukosis (Sarcoma group of retroviruses) This is a complex of viral diseases caused by an avian retrovirus with various manifestations such as lymphoid leukosis,
What are the principal sources of excessive nitrate and phosphate in rivers and lakes?
Homeostasis Homeostasis may be defined as the maintenance of constancy in the internal environment of the organism. This is essential for maintenance of life. Without homeost
A codon comprise three nucleotides. There are four possible nucleotides, each of which has an equal probability of being in any one of three spots. How many possible codons exist?
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