Which of the following features does not improve the rate of diffusion?
a. thin membranes lining respiratory organs such as gills and lungs
b. multiple infoldings of respiratory surfaces, such as lamellae in gills
c. inhaled fresh air is mixed with old air from the previous breathing cycle
d. blood circulates in counter current direction to water flow in gills

anti-human il13 stable cell line (lebrikizumab) can be provided from creative biolabs.

explanation:

the answer is admiramos

the rule for verbs is whoever you are referring to (in this case 'nosotros'), you need to change the ending of the word.

nosotros - amos

yo - o

tu - as

el, ella, usted - a

ellos, ellas, ustedes - an

(examples: nosotros bailamos (instead of bailar) or yo hablo (instead of habla)

you know that this symptom is misleading and quite often is related to: heart attack

a heart attack is a condition that occurs when the blood flow that transports oxygen to the heart muscle is damaged or cut off completely. the coronary arteries that supply the heart muscle with blood flow can be blocked by the accumulation of plaque. also, when the plaque within the heart artery breaks, it creates blood clot that can also hinder the blood flow. men that are over 45years of age and women that are over 55years of age are at risk of having a heart attack. the symptoms of a heart attack include chest discomfort, chest pain, coughing, and shortness of breath.