The circulatory and respiratory systems work together to circulate blood and oxygen throughout the body. Air moves in and out of the lungs through the trachea, bronchi, and bronchioles. Blood moves in and out of the lungs through the pulmonary arteries and veins that connect to the heart.
Soil nutrients are important to photosynthesis because they <u>help with chlorophyll </u><u>formation</u><u>.</u>
The four major types of germs are bacteria, viruses, fungi, and protozoa. They can invade plants, animals, and people, and sometimes they can make us sick.
Answer:
the way humans cAN CHANGE A VIRUS AND ITS DNA AND HOW IT ACTS
Explanation:
