Answer:
Mayra should be checked regularly for heart-related problems.
In FILTRATION, some type of pressure, such as gravity or blood pressure, forces substances across a membrane that acts like a filter.
Filtration
<span>Urea is the cellular waste product that the kidneys remove from the blood.Kidneys are the two bean shaped organs that has several functions to keep the body healthy. It not only removes urea from the blood, but also helps in the formation of urine and maintaining the fluid level of the body. The two kidneys are placed on the two sides of the spinal cord. The blood enters the kidney through the renal artery. The nephron within the kidneys mainly take out the waste products and the excess water from the blood and purifies it.If the kidneys of a person fail to work properly then it becomes important to perform dialysis for taking out the waste materials from the blood.</span>
Answer : Using Opthalmic Sponges.
Explanation : Collecting tears with the trivial methods is often not possible as to avoid the tear reflex is a different problem. Tear collection with glass capillaries are the most widely used method for taking samples and is considered to be the best method for avoiding tear reflex.
To collect tears are from elderly people or small children's who had difficulties with glass capillaries; for them ophthalmic sponges was used.
This kind of opthalmic sponges proved to be well tolerated by the patient, especially in small children's, and also enabled standardization of the tear collection in terms of volume.
