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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.
Z is a healthy adult female who ovulates in each menstrual cycle; Z is not pregnant. During Z's menstrual cycle, high blood plasma levels of progesterone A. Occur just prior
Q. Concerning their biological function what is the difference between DNA and RNA? DNA is the source of information for RNA production (transcription) and thus for protein syn
Which is the part of the human visual system where the receptors that sense light, i.e., the photoreceptor cells, are located? How do those cells work? The photoreceptor cells
Polymerase chain reaction already has extremely widespread applications and new uses are being devised on a regular basis. Some and definitely not all of the applications are given
Define Information Required for Management of Emergencies? Management or intervention needs accurate information about the actual situation and includes many non-nutritional co
CHARACTERISTIC S OF HORMONES - (1) They are regulatory chemicals that control and coordinate functions of different body organs. (2) Hormones are formed by ductle
MAY BEAR CLICA
What is Manifest Squint (Heterotropia) Manifest squint is a deviation of one eye from the normal position when the fusion reflex is present. The subcategories of manifest squin
What are the differences between genomes in prokaryotes vs. eukaryotes?
Facilitation Model - Models of Succession This is considered as the classical model of succession. It is based on the assumption that species of a previous stage are replaced
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