So, do nipples have the erectile tissue you find in the penis and the clitoris? The answer is "no". The anatomy books say, "underneath the nipple and areola, there are bundles of smooth muscle ...

Now, MIT engineers have taken a major step toward developing robots that replace rigid gears with something much softer – almost like real, living muscle tissue. In other words, they have found a way ...

“Currently there is no substitute for penile erectile tissue and few options for patients,” notes Atala. The researchers isolated rabbit smooth muscle and endothelial cells from corporal ...