The right answer is pectinated muscles.
The right atria extends between the two cellar veins. It is of rounded aspect, but for the simplification of its description, it is assimilated to one cube having 6 walls:
Anterior wall
A lower wall
A posterior wall
A top wall
An inner or septal wall
An outer or straight wall: relatively thin, has muscle thickenings: pectinated muscles. This is the preferred route of choice for cannulations during cardiac surgery under extracorporeal circulation.
Do you mean by-product? Because in that case no. Oxygen is not a by-product of the Krebs Cycle, but Carbon Dioxide is.
It is harmful because it cannot carry us much oxygen. It is helpful because it limits the transmission and effects of malaria, which is common in Africa.
Answer:
Option (B)
Explanation:
Chicago and Miami are both the cities in the United States, where Chicago is at a higher elevated area, whereas Miami is located in a low lying areas.
Chicago is located at an elevation of about 180 meter above the sea level, which is comparatively much higher than Miami, as Miami is at the coastal areas whose elevation is only about 2 meter above the sea level.
So, from the map it can be concluded that as Jessica travels from Chicago to Miami, it means that the elevation gradually decreases.
Thus, then correct answer is option (B).