Biology Questions

The red blood corpuscles  or erythrocytes usually carry antigens and there are two types of antigens. The A group persons have antigen A in their red corpuscles and the B group have antigen B in their red corpuscles. The AB group person have both antigen A and antigen B in their erythrocytes. The 'O' group persons have no antigens in their red corpuscles.

The command center of fluid intake is located in the Hypothalamus.

The pleura is the membrane that covers the lungs, according to InnerBody. The pleura consists of two layers, with the parietal pleura forming the membrane's outer layer and the visceral pleura forming the membrane's inner layer.

In the brain cerebellum, the arbor vitae refers to the cerebellar white matter which resembles the structure of arborvitae plant leaves and branches structure.

The pharynx is a passageway shared by both food and air.

The hormone adrenaline also called epinephrine is known as a stress harmone. In emotional upset (like fear, anger etc.) this harmone is poured into the blood and it accelerates heart beat. The hormone acetylcholine decelerates heartbeat rate.

Pulmonary abscess is a type of liquefactive necrosis of the lung tissue. 

Hence, Localized area of pus formation in the lungs is Pulmonary abscess.