Is the epithelium vascularized, Biology

Assignment Help:

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.  

 


Related Discussions:- Is the epithelium vascularized

Effect of environmental factors-sexual reproduction, Effect of Environmenta...

Effect of Environmental Factors some lower organisms, though the genetic determiners of the sexes are present, the ambient environment plays a decisive role in the development

Under nourished persons - nutritional intervention using mna, Define Under ...

Define Under nourished persons - nutritional intervention using MNA? An MNA score below 17 indicates that the patient is suffering from under nutrition.  Thus in this situatio

What are the two major morphological patterns of cnidarians, Q. What are th...

Q. What are the two major morphological patterns of cnidarians? Concerning locomotion how do these forms differentiate from each other? Morphologically, cnidarians classify as

Placenta - human development, Placenta - Human Development We had said...

Placenta - Human Development We had said previous in the unit that in the second week of development a primitive uteroplacental circulation is established. Early in this stage

Intra cranial mycotic aneurysms, The reported occurrence of ICMAs is 1.2 pe...

The reported occurrence of ICMAs is 1.2 per cent to 5 per cent of cases. Streptococci and S.aureus account for 50 per cent and 10 per cent of cases, respectively, and are seen with

Thymus, THYMU S - It is derived from the endoderm of the embryo. S...

THYMU S - It is derived from the endoderm of the embryo. Structur e . The thymus gland is located in the upper part of the thorax near the heart. It is a soft, pinkish, b

What is the full chemical equation of photosynthesis, Q. What is the full c...

Q. What is the full chemical equation of photosynthesis? The full chemical equation of photosynthesis is given below: 6 CO 2 + 12 H 2 O + light --> C 6 H 12 O 6    + 6 H 2

Potential air pollutants encountered in working environment, Question: ...

Question: a) Why is it important to maintain good standards of Indoor Air Quality in modern offices. Briefly explain the potential air pollutants encountered in such working

Donor selection and kidney preservation, DONO R SELECTION & KIDNEY PRESERV...

DONO R SELECTION & KIDNEY PRESERVATION - A kidney donor should be free of hypertension, diabetes & melignancy. Cardaveric kidney is obtained from brain death person. Kidney

Explain preoperative antibiotics, Preoperative antibiotics Preoperativ...

Preoperative antibiotics Preoperative antibiotics can decrease the incidence of infection after colorectal surgery; for elective operations, an oral regimen of neomycin (not a

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd