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

What do you mean by a dihybrid cross, A dihybrid cross: Determines the gene...

A dihybrid cross: Determines the genetic makeup of an organism always involves homozygous alleles. Always involves organisms that are heterozygous at all loci. Always involves alle

How is dna replication related to cancer, How is DNA replication related to...

How is DNA replication related to cancer? Cancer can result when errors happen in the replication of DNA in genes that control how a cell divides. A mass of cancerous cells kno

Explain about the probiotics, Explain about the Probiotics? A mono or m...

Explain about the Probiotics? A mono or mixed culture of living organisms, which when ingested in certain amounts, has a positive impact on host health, beyond conventional nut

Find aquaporin channels in the membranes, The secretary coil fills the lume...

The secretary coil fills the lumen with a NaCl solution that is isotonic with the blood plasma. As this solution moves upward through the reabsorptive duct, NaCl is reabsorbed into

hypotheses testing, Celia is a nurse in a geriatric ward.  She noticed tha...

Celia is a nurse in a geriatric ward.  She noticed that older persons in her care are having problems sleeping at night.  She decided to introduce non-pharmocologic ways of relaxat

Explain ventilation, Explain Ventilation, Chest Compressions? Even when...

Explain Ventilation, Chest Compressions? Even when the first three defibrillation attempts fail, the best chance of resuscitation still lies in successful defibrillation. Hence

Expalain briefly vitamin A, Vitamin A (Retinol) Purified vitamin A is a...

Vitamin A (Retinol) Purified vitamin A is a viscous yellowish oil. It is freely soluble in most organic solvents such as methanol, ether, acetone, chloroform and petroleum ethe

Skeletal system - arm bones, ARM BONES - Each arm contain 30 bones as ...

ARM BONES - Each arm contain 30 bones as : humerus in upper arm, radius ulna in forearm, 8 carples in wrist, 5 metacorples  in plam, 14 phalnges in fingers. HUMERU

Explain the term viruses, Normal 0 false false false EN...

Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4

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