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.
Section 3 Air Movement and Wind Key Concept Global winds and local winds are produced by the uneven heating of Earthâs surface. What You Will Learn â¢ Uneven heating of Earthâs surface by the sun causes differences in air pressure that cause wind. â¢ Wind patterns can be global or local and are influenced by the rotation of Earth and by geography. Why It Matters