A broad accumulation of stratified drift deposited adjacent to the downstream edge of an end moraine is a(n) ________. During the most recent ice age, glaciers covered about ________ percent of Earth's land area. The most abundant chemical sedimentary rock is ________.
The distal end of the femur articulates with the tibia in the lower leg and the patella or knee cap. The tibia below does not articulate with the patella. Between the condyles is the patellar surface that articulates with the patella or knee cap. These landmarks are important attachments for ligaments and muscles which will be discussed later in this unit. Another important anatomical component of the knee are the menisci.
The radius and ulna (bones of the forearm), shown in supination (the arm rotated outward so that â¦EncyclopÃ¦dia Britannica, Inc. The ulna is present in all land vertebrates. In amphibians and some reptiles the radius and ulna do not articulate. The elbow joint evolved first among birds and mammals. The radius tends to be slender in birds; but the ulna is more often reduced in mammals, especially in those adapted for running and, in the case of bats, flying.