Episode 16

"Excitement, Swelling, and Emptiness" (興奮、膨張、虚無) is the 16th episode of the Cells at Work! (Anime) anime adaption.

Plot
The cells are complaining of their lack of oxygen, and red blood cells complaining about how exhausting work is.

An announcement gets broadcasted throughout. The body is about to enter a state of arousal. The red blood cells are given an important task, fill the erectile tissue with blood to trigger an erection.

AA2153 is excited about the opportunity to contribute to the birth of a new life. He and a few coworkers go to the male reproductive organ, Corpora-Cavernosa, to begin their new task. But while in line, AA2153 gets bullied by veteran Erythrocytes who cut in front of him. Luckily U-1196 comes along and chases the bullies away. They, along with U-1212 and U-8787 two go to the testes, a nursery for Spermatogonia - male reproductive cells that mature into sperm - where Sertoli cells take care of them.

However, things take a turn when accumulated stress impairs the erection. Luckily, the body consumes an intake of Sildenafil, also known as Viagra. Thanks to the boost and the efforts of the red blood cells, the body achieves ejaculation.

But intercourse allows an infection to come inside the body. Depleted and at a numerical disadvantage, the white blood cells must fight against Neisseria Gonorrhoeae with everything they have.

Characters

 * AA2153
 * AC1677
 * Erythrocytes
 * U-1196
 * Neisseria Gonorrhoeae
 * U-1212
 * U-8787
 * Spermatogonia
 * Sertoli
 * Sildenafil