Okay, so let's start with the two different types of skeletal muscles.
There are fast skeletal muscles and slow skeletal muscles.
And they differ on a few criteria.
So first of all the slow, skeletal
muscles, use oxygen as their energy source.
And because they use oxygen, they need to get it from the blood.
They need to be, vascularized, so there's lots of
capillaries that are going into the, slow skeletal muscle.
And it gives the, this muscle the appearance of red.
It gives it a red appearance.
And because it's, it's deriving its, its energy
resource from blood, it can't be too far away from a capillary.
That puts a, an upper limit on how big this muscle can be.
It can be, it can't be very big.
So, it, the upper limit is, is if we looked at the cross section, a, a
muscle fiber looks like this, but if we took a cross section, we'd see that.