Hi !
<em>Name the 3 pollutants that have decreased the most since the 1990</em>
Answer:
<em>- lead, </em>
<em>- sulfur dioxide (SO2) </em>
<em>- oxides of nitrogen (NOx).</em>
right side:
Blood enters the heart through two large veins, the inferior and superior vena cava emptying oxygen-poor blood from the body to the right atrium.
atrium contracts, blood flows from your right atrium into your <em>right ventricle</em> through the open tricuspid valve.
ventricle contracts, blood leaves the heart through the pulmonic valve, into the <em>pulmonary artery</em> and to the lungs where it is oxygenated.
left side:
<em>pulmonary vein</em> empties oxygen-rich blood from the lungs into the <em>left atrium</em>.
contracts, blood flows from your left atrium into your <em>left ventricle </em>
ventricle contracts, blood leaves the heart through the aortic valve, into the<em> aorta </em>and to the body.
veins carry blood to the heart ( deoygenated blood)
Arteries carry blood from heart ( oxygen rich blood)
Capillaries connects them.
Answer:
A patient who can produce antibodies against some bacterial pathogens, but not against viral infections, probably has a disorder in his, B cells.
a) B cells
True, a disability is a physical or mental impairment, illness, or disease. A physical or mental impairment that limits one's ability to carry out normal day to day functions and tasks.
What would happen if t. Brucei suddenly loss the ability to undergo antigenic variation
If T. Brucei lost the ability to undergo antigenic variation, it would cause it to not be able to hide itself from our defenses and our body would be able to fight it.
