Calf (leg) The calf (Latin: sura) is the back portion of the lower leg in human anatomy. The muscles within the calf correspond to the posterior compartment of the leg. The two largest muscles within this compartment are known together as the calf muscle and attach to the heel via the Achilles tendon. Several other, smaller muscles attach to the knee, the ankle, and via long tendons to the toes.
Wind is caused by unequal air pressure formed when the sun heats the earth's surface unevenly. As such, if one part of the earth is heated and another part isn't, the wind wil â¦ l blow from the former to the latter, regardless of the direction that is. 3 people found this useful.
How does wind form? Wind is air in motion. Wind forms when the sun heats one part of the atmosphere differently than another part. This causes expansion of warmer air, making less pressure where it is warm than where it is cooler. Air always moves from high pressure to lower pressure, and this movement of air is wind. During the day at a coast, the sun heats the air above the land more quickly than the air above water. The warm air over the land expands and rises.