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in the image above of an alveolus, what is the identity of the two visible tissue layers labeled c and d.

a. c = inner wall of alveolar sac; d = outer wall of alveolar sac
b. c = inner wall of alveolar sac; d = outer capillary wall
c. c = outer wall of alveolar sac; d = outer capillary wall
d. c = inner capillary wall; d = outer capillary wall

C

Explanation:

D shows the outer wall of the capillary and C shows the outer wall of the alveolar sac. (The pink cloud looking thing)

carbon

explanation:

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.