Answer:
The correct answer would be D.Alveolar sacs are surrounded by thin capillaries where gases can be exchanged.
Alveoli are tiny sacs which form the site of gas exchange in the lungs.
The features of alveoli which help in gas exchange are:
- They increase the surface area in the lungs thus, more space is available for gas exchange.
- They have very thin walls, as thin as the thickness of a single cell only.
- They are surrounded by a bunch of thin capillaries which exchange gases with alveoli.
Answer:
Hello now,
The human body system that would be most affected in this scenario would be B, the Respiratory and circulatory system.
Bacteria will multiply so fast between
41-135 degrees Fahrenheit. Bacteria
can grow rapidly in the TDZ, also known as the Temperature Danger Zone, which
is 41f - 140f. Generally 37 degrees - body temperature. However some,
such as fungi, prefer lower temperatures as they are found on the outside of
the body. Similar some bacteria.
99% of calcium is found inside the cells of the body.
Because there are several factors that determine weight loss or gain and reducing calorific intake is just one of them (for reducing weight loss). Other factors that should be considered is exercise. Doing regular exercise ensures that the metabolic rate of the body is increased so much of the calories are burned even after intake. Having a lower metabolic rate can result to increased weight gain even with low calorie intake.
