Answer:
Explanation:
Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart.
As the atrium contracts, blood flows from your right atrium into your right ventricle through the open tricuspid valve.
When the ventricle is full, the tricuspid valve shuts. This prevents blood from flowing backward into the atria while the ventricle contracts.
• As the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated. Note that oxygen-poor or CO2 containing blood goes through the pulmonary artery to the lungs where CO2 is exchanged for O2.
Left side of the heart (operating at the same time as the right side of the heart)
The pulmonary vein empties oxygen-rich blood from the lungs into the left atrium of the heart.
As the atrium contracts, blood flows from your left atrium into your left ventricle through the open mitral valve.
When the ventricle is full, the mitral valve shuts. This prevents blood from flowing backward into the atrium while the ventricle contracts.
As the ventricle contracts, oxygen-enriched blood leaves the heart through the aortic valve, into the aorta and to the arteries and eventually into veins to complete the blood circulation in your body.
Answer:
Homeostasis
Explanation:
Homeostasis describes the tendency of the body to maintain a "constant" internal state. If you get cold, your body responds by increasing processes that make you warmer (e.g. shivering) in an effort to restore things back to how they were. The same thing is happening here - blood pressure has gone down, so the body responds by doing things to increase blood pressure such as by increasing angiotensin II.
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Nephrons
The kidney's functional unit that is in charge of producing urine is called a nephron. More than a million nephrons can be found inside each kidney.
<h3>What are Nephrons ?</h3>
The structural and operational unit of the kidney is the nephron. It filters the blood and reabsorbs the vital nutrients to control the levels of water and minerals like sodium
- Glomerulus, Bowman's capsule, Proximal convoluted tube, Loop of Henle, Distal convoluted tube, and the collecting duct are the six components that make up a nephron.
- The nephron produces urine through the processes of filtration, reabsorption, secretion, and excretion. These are applicable to many substances.
Learn more about Nephrons here:
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