I think it's Homeostasis. If not then I apologise.
Negative Definition)) Health and well-being can be described as the absence of physical illness,disease and mental distress.
Positive Definition)) Health and well-being can be described as the achievement and maintenance of physicalfitness and mental stability.
I think it is going to be C.
The second trimester is when the respiratory system is mature.
Answer:
Explanation:
Erythropoiesis is the process by which red blood cells, also known as erythrocytes, are made and are stimulated by decreased levels of oxygen in the blood, which sets into motion the secretion of erythropoietin, a hormone central to the formation of red blood cells
