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Is the epithelium vascularized? How do nutrients and oxygen reach the epithelium? Why is this feature a significant evolutionary acquisition?
Epithelia are not vascularized (capillaries do not directly reach their cells). The epithelium exchanges substances by dispersal with the connective tissue situated under it.
As the epithelia are not vascularized minuscule skin injuries or scratches that occur all the time do not trigger bleeding and do not expose the blood to contamination from external agents. This is an significant protective method discovered by evolution.
What are abiotic factors? The Abiotic factors are the nonliving elements that constitute a given environment, like light, temperature, water, minerals, gases, atmospheric press
WHAT ARE THE TYPES OF EGG ON THE BASIS OF YOLK ?
PHYLUM MOLLUSCA Definition and Introduction Basically bilateral and protostomial eucoelomate eumetazoans whose soft body (L. Millis or molluscum= soft) is unsegmente
Removal of a patient's peripheral intravenous catheter resulted in brief bleeding and the loss of a small amount of blood. Which of the following processes occurred during the form
What is Dinoflagellates ? Dinoflagellata or dinoflagellates , are characteristically unicellular photosynthetic organisms that usually have two flagellae. One flagellum typi
Explain Food Applications of gum karaya The water absorbing and water-holding capacity of Karaya, together with an excellent acid compatibility made it suitable for its use
Q What is signifying by concentration gradient? Is it correct or not to refer to "concentration gradient of water"? Concentration gradient is the variation of concentration of
Congenital Discrete Subvalver Stenosis : The abstraction could be fibrous or fibro muscular. It could be anywhere from just below the aortic cusps upto the level of the free edge
Animal Tissue A tissue is a group of cells that are similar in structure, origin and function. Tissue word coined by Bichat (Father of Histology). Histology term
Q. Why are euglenas involved in polemics related to their taxonomic classification? Euglenas are involved in taxonomic polemics because they tend to be classified sometimes as
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