<span> How does pulmonary circulation work? In my example below, we will start with the blood not reaching the heart yet. The heart beats around 75 beats a minute. Deoxygenated blood is in the veins, going to the heart. Note that veins will always carry deoxygenated blood, excluding the pulmonary veins. The deoxygenated blood goes into the heart through the superior or inferior vena cava, and goes into the right atrium. It then gets pumped into the right ventricle, and gets pumped through the pulmonary arteries to the lungs to get oxygenated. The blood, now oxygenated, comes back to the heart through the pulmonary veins, into the left atrium. The blood gets pumped from the left atrium to the left ventricle, where it gets pumped through the aorta to all of the body systems. The red blood cells travel through capillaries, which is where most of the gas exchange occurs between body cells and red blood cells. Red blood cells have no nuclei. When the red blood cells are no longer red, but blue due to lack of oxygen, they go back to the heart to get pumped to the lungs, and enter the heart through the superior or inferior vena cava. The cycle starts over. Just like the veins, arteries always carry oxygenated blood, excluding the pulmonary arteries. Also, the right side of the heart will have deoxygenated blood, or blue blood, and the left side of the heart will have oxygenated blood. </span>
Chimpanzee for the first one
The correct option is (D) Many parasites release fertilized eggs in the feces of humans and other animals.
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How toilets can prevent spread of disease?</h3>
- Toilets save lives! Deathly infections proliferate quickly in an absence of restrooms. Every day, over 750 kids under five pass away from diarrhea brought on by contaminated water, subpar sanitation, and bad hygiene.
- Girls who attend schools without restrooms may fall behind in their studies. Many students are compelled to skip school while they are on their period because there are inadequate sanitary facilities.
- Toilets are an excellent purchase. According to data by the WHO, every dollar spent on cleanliness has a return of $5.50 USD.
- However, 892 million individuals practice open defecation, which involves going outside and defecating in bushes, on the side of the road, or in garbage piles.
- 90% of those who use open defecation live in rural areas, therefore it's frequently a question of where they are located.
Learn more about the Hygiene and communicable disease with the help of the given link:
brainly.com/question/24236891
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