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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.
State the concespts of soil- pedology and edaphology In the last two centuries of scientific study, two concepts or approaches to the study of soil have evolved. One called p
How does the plant cell wall react when it is placed under hypotonic medium? Ans) The plant cell wall (the covering of the cell outside to the cell membrane) is made of cellulos
Define Precautions for Simple Staining of Bacterial Cultures? 1. Heat fix all the bacterial smears. 2. Use clean, grease free glass slides. 3. Wash the stained slide gent
Q How is the circulatory system of birds characterized? Like every vertebrate, Birds, have a closed circulatory system. The heart is similar to the mammalian heart, having four
Benefits of Exercises Benefits of exercises for a diabetic patient are given below: - Improves sugar control. - Decreases HbA1C level. - Decreases blood pressure. -
Explain about the Obliques muscles The superior and inferior oblique muscles form an angle of about 51 0 with the optical axis. The oblique muscles produce cyclorotation becau
Plants use proteins, lipids and starch as seed storage compounds. What is an advantage of using proteins as a storage compound that are not afforded by lipids or starch?
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Define Advantages of using Bacteria as a source of protein? Advantages of using Bacteria as a source of protein are as follow: 1. High yield of protein (60-80%) 2.
What is the difference among double closed circulation and simple closed circulation? Double closed circulation, or closed circulation, is that in which the blood circulates by
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