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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.
Pathogenic bacteria Heterotrophic bacteria could be divided into saprophytes and parasites. Saprophytes normally do not cause any disease and they survive on dead or decaying
any interesting information about recombinent DNA
Q. What are the antigen-presenting cells of the immune system? The antigen-presenting cells of the immune system also known as APC cells are cells that do digestion and phagocy
characters of phylum rynchocephalia
Q. Show the important groups of bacteria? The important groups of bacteria are: a) Bacillus: rod-shaped. b) Coccus: spherical. c) Coccobacillus: oval-shaped. d)
Define the interaction of vitamin c with iron and cadmium? Toxic levels of dietary cadmium (5-200 ppm) interfere with iron absorption and produces iron deficiency. Supplements
The purpose of examining the abdomen should be for detection of renal artery bruit and abnormal kidney masses like kidney tumours and polycystic kidneys. Aortic abdominal aneurysms
classification of coelenterats?
male sex organs
Marine Ecosystems Marine ecosystems cover 70 per cent of the earth's surface and have an average depth of 3.750 m (the greatest known depth being 10,750 metres in the Mariana
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