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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.
Biosphere Biosphere is that part of the earth where life can exist. It is a narfqy layer around the surface of the earth. If you visualise the earth to be the size of an apple
Define the term Ancestral characteristic A character shared by all members of a taxonomic group of organisms (taxon) and used to define the unique nature of the group. The cha
REDISCOVERY OF MENDEL'S LAWS (THE BIRTH OF GENETICS) 1. It was in 1900 that three botanist independently rediscovered the principles of heredity already worked out by M
Define types of Dryers? There are many other dryer types available, such as; Osmotic Drying Impingement Drying Microwave and Dielectric Drying Superheated
Diestrus- Estrous cycle This lasts 60 to 70 hours during which functional regression of the corpora lutea occurs. The uteri are small, anaemic, and only slightly contractile.
Introduction to Metabolism An organism have to be managed its cellular organization and internal equilibrium despite the external forces which act upon it. Cells take in nutrie
What are the cells responsible for the production of antibodies? The cells that make antibodies, i.e., the cells of the humoral immune system, are the B lymphocytes (B cells).
Nongonococcal nonchlamydial urethritis and cervicitis Nongonococcal urethritis (NGU) in men is often nonchlamydial as well. Possibly caused by Ureaplasma urealyticum, Mycoplas
green gland is excretory organ of which ortopodic phylem
write the charecteristics of lake ecosystem
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