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xxMikexx [17]
3 years ago
13

A cornea transplant involves the grafting of a donor cornea into a recipient’s anterior eye. The sutures to hold the graft in pl

ace must stay in place for a long period of time because the cornea is slow to heal. Explain why the healing process is so slow.
Medicine
1 answer:
BabaBlast [244]3 years ago
4 0

Answer: The cornea is avascular.

Explanation:

The cornea can be defined as the clear front membrane on the surface of eyeball. It lies in the front of the iris and pupil. It allows the light to enter the eye. A cornea transplant is recommended in patients who suffer from vision problems due to thinning of cornea, keratoconus, loss of vision and cloudiness of cornea.

It takes about 2 to 3 months to recover after surgery. The healing is slow because the cornea is avascular. The tissue of cornea does not provide blood vessels to deliver nutrients and oxygen which could aid in speedy recovery.

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Where are the upper and lower borders of the kidneys located?
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Answer:

Their upper extremities are on a level with the upper border of the twelfth thoracic vertebra, their lower extremities on a level with the third lumbar. The right kidney is usually slightly lower than the left, probably on account of the vicinity of the liver.

7 0
3 years ago
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Trace the path of a red blood cell from the renal artery to the glomerulus:
Lunna [17]
The answer is C. 1,3,2,4
7 0
3 years ago
Do you think that we should allow to give a children vaccination, why or why not?
Bond [772]

Answer:yes

Explanation:If a child doesn't has bruises or cuts germs could get in and get them sick but, a vaccination would clean the germs out for a healthier life

5 0
3 years ago
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A client taking phenytoin (Dilantin) chronically for seizures should be encouraged to maintain good oral hygiene and visit the d
alekssr [168]

We can confirm that a client taking phenytoin (Dilantin) should be encouraged to maintain good oral health in order to avoid gingival hyperplasia.

<h3>What is gingival hyperplasia?</h3>

This is the overgrowing of the gums around the teeth. This can cause irritation and pain within the mouth area. It is important to maintain good oral health as this can be the main cause of gingival hyperplasia, which is only exacerbated by the side effects of phenytoin (Dilantin), which can also lead to gingival hyperplasia.

Therefore, we can confirm that a client taking phenytoin (Dilantin) should be encouraged to maintain good oral health in order to avoid gingival hyperplasia.

To learn more about oral health visit:

brainly.com/question/7614630?referrer=searchResults

6 0
2 years ago
How could you explore the origin of the different types of blindness?
igor_vitrenko [27]

Answer:

Common causes of blindness are diabetic neuropathy, glaucoma and cataracts.

Explanation:

Blindness refers to the complete lack of functional vision.It occurs when an inadequate amount of light hits the retina, or the information has not been delivered to the brain correctly.

Complete blindness : characterized by a complete and total loss of vision. Merck Manuals reports that legal blindness is defined as having equal to or worse than a 20/200 visual acuity in the better eye. Having a visual acuity of 20/200 means that someone with normal vision can see an object at 200 feet, and a person with impaired vision can see at a distance no further than 20 feet. Several different diseases can cause complete blindness; some develop later in life and some are present at birth. The leading cause of blindness in the United States is diabetes, according to the National Eye Institute. Diabetes causes diabetic retinopathy, which results in destruction of the retina. Other causes of complete blindness include age-related macular degeneration, which the National Eye Institute calls the most common cause of blindness in adults who are 60 or older; cataracts, which obstructs light from hitting the retina because of opaque patches on a lens; and glaucoma, which causes blindness due to damage to the optic nerve.

Color Blindness :

People who have color blindness, also called dyschromatopsia, are unable to distinguish certain colors. This type of blindness more commonly affects men than women. Merck Manuals reports that the most common form of color blindness is red-green color blindness, which makes it difficult to distinguish certain shades of red and green. Color blindness is almost always present at birth, and is usually caused by the presence of a defective gene on the X chromosome. The reason that more men are affected by color blindness than women is that women have two X chromosomes; thus, even if they are "carriers" of a bad gene, their other X chromosome usually has a functional gene. Because men have only one X chromosome, the presence of one bad gene is sufficient to cause color blindness. Defective retinal cells result in some forms of color blindness; other forms are caused by defects in the optic nerve.

Night Blindness :

Night blindness is vision impairment that occurs at night or when light is dim. It does not generally result in a complete lack of vision but significantly impaired vision. People with night blindness often have difficulty driving at night or seeing stars. Several different factors cause night blindness, according to the University of Maryland Medical Center. These factors include cataracts, birth defects, a vitamin A deficiency, or a retinal disease called retinitis pigmentosa

5 0
3 years ago
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