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.
Regular cyclists understand the power that cycling has on transforming the body. From both a speed and strength perspective, cycling builds the muscular structure while targeting cardiovascular endurance. While the primary muscles targeted are certainly the lower body muscles, the arm muscles as well the as the core also get in a great workout. Cycling has a variety of general health benefits such as fat lose, heart and lung function improvement, calorie burner, and targeting most the major muscle groups in the body.