system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How can a person have 8 pack abs when theres only 6 rectus abdominis?
gpt
Actually you just have 1 rectus abdominus muscle, which is split in the middle longitudinally by linea alba (white line). And there are tendinous insertions horizontally that gives the impression that you have 6 different muscles. There are normally 3 of these insertions, hence 6 bulges, but some have 4 of them making a 8-pack.