Answer:
Without veggies, you're more prone to digestive disorders such as constipation, hemorrhoids, and diverticulosis. Owy! Vegetables contain cellulose, which increases stool weight, eases passage, and reduces transit time.
A is the answer. I believe, although I’m not 100% sure
<span>The big bang theory of the formation and expansion of the universe is supported by the observed
</span>Red shift
Answer:
Once the oxygen diffuses across the alveoli, it enters the bloodstream and is transported to the tissues where it is unloaded, and carbon dioxide diffuses out of the blood and into the alveoli to be expelled from the body. Although gas exchange is a continuous process, the oxygen and carbon dioxide are transported by different mechanisms.
Transport of Oxygen in the Blood
Although oxygen dissolves in blood, only a small amount of oxygen is transported this way. Only 1.5 percent of oxygen in the blood is dissolved directly into the blood itself. Most oxygen—98.5 percent—is bound to a protein called hemoglobin and carried to the tissues.
Hemoglobin
Hemoglobin, or Hb, is a protein molecule found in red blood cells (erythrocytes) made of four subunits: two alpha subunits and two beta subunits (Figure 20.19). Each subunit surrounds a central heme group that contains iron and binds one oxygen molecule, allowing each hemoglobin molecule to bind four oxygen molecules. Molecules with more oxygen bound to the heme groups are brighter red. As a result, oxygenated arterial blood where the Hb is carrying four oxygen molecules is bright red, while venous blood that is deoxygenated is darker red.
In the small intestine, muscular contractions squeeze chyme forward, and digestive secretions from the pancreas, gallbladder, and intestinal lining chemically break down the nutrients.
<h3>What is the role of the small intestine in food digestion?</h3>
The small intestine plays is a major organ in the process of digestion.
The small intestine is the part in which absorption of nutrients takes place.
The small intestine is the longest part of the digestive system.
Contraction of smooth muscles presents along the walls of the small intestine help to move food forward while the villi absorb the nutrients.
In conclusion, the small intestine is essential to digestion.
Learn more about the small intestine at: brainly.com/question/1204177
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