The physical characteristics of influenza viruses are that they are single-stranded, RNA viruses enclosed in a helical nucleocapsid. On the outside, these viruses are enveloped. Two important proteins are found on surface of this envelope: hemagglutinin and neurominidase.
Explanation:
1. A human cardiovascular system is how your heart beats and your blood pumps.If there is any fail in a human cardiovascular system that can lead to cardiovascular disease also known as heart disease or cardiac arrest
2. The human body digestive system is what digests anything a person takes in with our tongue,salivary glands, & liver. The digestive system breaks all down all the food that we take in and separates them into different sections.
3. The function of immune system is part of our body which fights and compromises biological germs that enter our body
4. The nervous system is a function which releases a chemical that triggers
our body to become nervous
5. Your respiratory system is how long you can workout running ,cycling, and jump rope take a lot of respiratory
6. The urinary function is what flushes out the waste our of your body as urine
this is a very crucial part in a human body
A.) staying free of disease (physical)
B.) reflecting about yourself (mental)
C.) getting 8-10 hours of sleep each night (physical)
D.) engaging in 30-60 minutes of physical activity every day (physical)
Since B is a mental activity...
The answer = B. reflecting about yourself
Good Luck!
