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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.
Which are growth tissues of plants? How do they categorize and where can they be found? Growth tissues of the plants are the meristems. The Meristems are the tissues that produ
What are the in-vivo imaging techniques The first of the in-vivo imaging techniques, computer tomography (CT) scanning, came on stream in the early 1970s. As technologies devel
main branches of biology
Polychaete, Mollusca and Echinodermata Polychaete and Mollusca The polychaetes have a trochophore larva. A common trochophore larva is top shaped bearing a tuft of cilia
What is antistaphylococcal prophylaxis and pseudomonas aeruginosa? I''m doing a project on cystic fibrosis, and I''m curious what these terms have to do with the disease. Thanks!
iwant to know all about phylem protozoa?
What are the adaptions flatworms neeed in order to live in their environment?
Foods with moderate amounts of protein can be eaten in limited amounts. These foods include grains, bread, pasta, rice, potatoes, corn, and peas. Foods with little or no protein ar
CLOSED HEART SURGERY : Operative procedures on the heart or major intra thoracic vessels done when the heart is beating and supporting effective circulation come under the ca
Explain vegetable sterilization process Canning, which involves heat sterilization, is one of the most important processes in vegetable preservation. As compared to other foods
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