This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Explain the function of the lacrimal sac. What will be an ideal ... (Read 37 times)

OSWALD

  • Hero Member
  • *****
  • Posts: 580
on: Jun 27, 2018
Explain the function of the lacrimal sac.
 
  What will be an ideal response?

Question 2

Describe the layers of pleura and how they prevent friction caused by breathing.
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

dpost18

  • Sr. Member
  • ****
  • Posts: 345
Reply #1 on: Jun 27, 2018
Answer to Question 1

The enlargement of the upper portion of the lacrimal duct is known as the lacrimal sac. Tears secreted by the lacrimal glands are pulled into this sac and subsequently forced into the nasolacrimal duct by the blinking action of the eyelids. The sac is dilated and pulls in fluid as the muscles associated with blinking close the lids. The sac constricts, forcing the fluid down the nasolacrimal duct as the lids are opened.

Answer to Question 2

The visceral pleura is the membrane that covers the outside of the lungs. The parietal pleura is the membrane that lines the pleural or lung cavities. Between these two pleura is a small space which is filled with a serous fluid to prevent friction when the lungs expand and deflate.


OSWALD

  • Member
  • Posts: 580
Reply 2 on: Jun 27, 2018
YES! Correct, THANKS for helping me on my review

yeungji

  • Member
  • Posts: 319
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.

Did you know?

Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.

Did you know?

Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.

Did you know?

Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates’s recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Structure and function of a chemical synapse. Structure and function of a chemical synapse.
Testing motor function of cranial nerve VII - Raise eyebrows Testing motor function of cranial nerve VII - Raise eyebrows
Derivative of Inverse Trig Function Derivative of Inverse Trig Function
Sketch a graph of the function h(x), by hand on the following interval: Sketch a graph of the function h(x), by hand on the following interval:
Quadratic Function on a Banana Quadratic Function on a Banana
Effects of disrupted growth hormone function Effects of disrupted growth hormone function
Video: Energy inputs and release in glycolysis Animation

For a complete list of videos, visit our video library