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.
Cycling Anatomy: Leg Muscles in Action. 1  Visual representation of Cycling Anatomy in action. 2  Muscles used during cycling pedal stroke in action during racing. 3  Cycling leg muscle anatomy and their use during the pedal stroke. How Your Brain Affects Your Cycling There are so many aspects of human anatomy and physiology which are involved in the action of riding a bicycle.