Question

Lymphatic system. Covid vs Man

1. What does the lymphatic system do on a daily basis for me?

2. Why did my system protect me, while others systems have failed to protect them?

3. How do viruses take over the body? Why is covid 19 so sucessful?

4. Why don't my natural killers and antibodies protect me?

5. How is it that one non-living "thing" can kill so many?

Answer 1

Ans :

1. Lymphatic system:

Functions and uses :

The lymphatic system is a network of tissues and organs that help rid the body of toxins, waste and other unwanted materials. The primary function of the lymphatic system is to transport lymph, a fluid containing infection-fighting white blood cells, throughout the body.

The lymphatic system has three main functions:

It maintains the balance of fluid between the blood and tissues, known as fluid homeostasis.

It forms part of the body’s immune system and helps defend against bacteria and other intruders.

It facilitates absorption of fats and fat-soluble nutrients in the digestive system.

The lymphatic system plays a key role in the immune system, fluid balance, and absorption of fats and fat-soluble nutrients.

As lymph vessels drain fluid from body tissues, this enables foreign material to be delivered to the lymph nodes for assessment by immune system cells.

The lymph nodes swell in response to infection, due to a build-up of lymph fluid, bacteria, or other organisms and immune system cells.

Lymph nodes can also become infected, in a condition known as lymphadenitis

2. Strength of immune system :

A strong immune system helps to keep a person healthy.

The immune system consists of organs, cells, tissues, and proteins. Together, these carry out bodily processes that fight off pathogens, which are the viruses, bacteria, and foreign bodies that cause infection or disease.

When the immune system comes into contact with a pathogen, it triggers an immune response. The immune system releases antibodies, which attach to antigens on the pathogens and kill them.

Incorporating specific foods into the diet may strengthen a person’s immune response.

Tips to boost immune system:

Don't smoke.

Eat a diet high in fruits and vegetables.

Exercise regularly.

Maintain a healthy weight.

If you drink alcohol, drink only in moderation.

Get adequate sleep.

Take steps to avoid infection, such as washing your hands frequently and cooking meats thoroughly.

3.Virus multiplication : COVID 19

For most people, Covid-19 seems to be pretty mild. And it takes a while—to the tune of five days to two weeks—to cause symptoms, if it does at all.

Unfortunately, that’s exactly what makes the novel coronavirus so dangerous. In the period that an infected person is asymptomatic or mildly ill, they could transmit the virus to dozens of other people through water droplets expelled by coughs or sneezes, transferred on skin and other surfaces.

All viruses are intracellular parasites. Their only mission in life, if you can call it that, is to use the mechanisms of human cells to make copies of themselves. The tricky task is finding a way into the cells where they can replicate. The novel coronavirus, SARS-CoV-2, isn’t particularly good at that. Research so far suggests that it sneaks in through a single cellular door: a membrane protein called ACE2.

Angiotensin converting enzyme 2 receptors, or ACE2 receptors for short, are a part of the sympathetic nervous system. Their job is to bind to a hormone (conveniently called the ACE2 hormone) as part of the body’s stress response. The ACE2 hormone plays a role in constricting blood vessels, which raises blood pressure.

Most worryingly, ACE2 receptors appear on cells in the most delicate part of the lungs: the alveoli. They’re responsible for the vital gas exchange of taking in oxygen and releasing carbon dioxide. Damage to these cells is what causes some of the most common symptoms of the virus, like shortness of breath. Coughing is a result of the lungs trying to expel the infection.

This is where the real danger in Covid-19 lies, and why there’s been so much emphasis on social distancing. The virus can only survive if it continues to find new hosts. By staying isolated while feeling well for 14 days, you’re eliminating the chance that you could pass on the virus to someone else. The minute you go outside again and someone else passes the virus onto you, “you reset the clock,”