What do you think about the corona virus?
do you think it will ever get better?
do you think it is the beginning of the end of the world?

Well about COVID, it is more deadlier and infectious than SARs. It's outbreak was the worst thing to happen in the first place. But in China, people are always fascinated by new things and food. They have many categories, especially in food. The main outbreak happened in Wuhan where people tend to eat Bats, meats etc. The spreading of this virus was mainly beacuse of unhygenic meat slaughtering system that led the COVID reach Humans through meat. Things are slowing down and China has saved it's people through Isolation, protection, medications etc. Now the death rate in China is decling(which is a good thing). I think no. There won't be an apocalyptic situation. Almost all the countries have taken safety measures to stop the infections. Even free gas mask are given to people of most of the countries. Those who resist for check up are taken forcefully to the ward. The world will face virus or disease outbreak which at some point will be cured like COVID(it's not cured but research is still on. And Doctors often say that PREVENTION IS THE BEST MEDICENE).

the answer is: they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur twice a year in the spring and fall.

question#1

ans:

cell is the basic unit of organization of all living things. cells are often called the building block of life and it is the smallest unit of life. the study of cell is called cell biology. cell consists of cytoplasm enclosed within membrane, which contain bio-molecules such as proteins and nucleic acid.

two third of cell is water, which means that two-third of your whole body is water. the rest is the mixture of molecules, mainly proteins, lipids and carbohydrates.

question#2

ans:

organ:

an organ is a group of tissues specialized to form a functional unit. an example is the heart in animals.

organ system:

an organ system is a group of several organs whose functions are synchronized to release an effective action in a living organism. an example is digestive system.

question#3

different systems perform different function at tissue level. for example, the respiratory system facilitates breathing. in the alveoli tissue of the lungs, the exchange of oxygen and carbon dioxide molecules between the air and the bloodstream occurs by passive transport, so that oxygen is taken in and carbon dioxide and water are removed. different systems of the body carry out different functions. for example, your digestive system is responsible for taking in and processing food, while your respiratory system working with your circulatory system is responsible for taking up oxygen and getting rid of carbon dioxide.

question#4

different systems perform different function at tissue level. for example, the respiratory system facilitates breathing. in the alveoli tissue of the lungs, the exchange of oxygen and carbon dioxide molecules between the air and the bloodstream occurs by passive transport, so that oxygen is taken in and carbon dioxide and water are removed. different systems of the body carry out different functions. for example, your digestive system is responsible for taking in and processing food, while your respiratory system—working with your circulatory system is responsible for taking up oxygen and getting rid of carbon dioxide.

question#5

our body works because of the interactions that happen between organs and organ systems.  

for example:  

the heart to regulate blood flow throughout the body. the blood carries oxygen and nutrients to the cells and carries carbon dioxide and waste away from the cells. body systems work together in maintaining a constant internal environment. when this balance is disrupted, the body systems may not function properly, and human health can suffer.   you start to feel bad.