The thymus gland is known as the 'throat sweetbread' or 'heart sweetbread' depending on the part of the thymus being considered. The thymus gland has two parts. The heart sweetbread is attached to the last rib and lies near the heart, although the name may refer to its shape as much as its location.
The overall result of regular cycling is a lean, fit body with notable stamina increases. The most obvious area of muscle building during bike rides is the lower body, more specifically the legs. Cyclists build the two main muscles located in the calf: soleus and gastrocnemius. The soleus helps to lift the heel and the gastrocnemius is the prominent part of the calf that allows riders to go.
However, scooting closer to the pedals, which place your knees at a bent angle, help work the lower abdominal muscles well. The recumbent bike also builds the quadriceps. These are the muscles that are along your upper thighs. The quadriceps are large muscles and this benefits your body and the aesthetics of your legs. While pedaling the recumbent bike, your upper leg is engaged and moves up and down, which effectively works these muscles.