Wild Horses’ Natural Selection. Equine Anatomy . As seen in diagram B the thumb of the human is a vestigial part of the dog’s foot, meaning a mutation from a previous ancestor that still appears in subsequent generations but is no longer used for the same purpose. The hoof also acts as a shock-absorber in that the hoof acts to reduce the concussion of foot impact on the structures of the distal limb. It’s easier to understand hoof dynamics when we compare the hoof’s structure and composition to the nails on our own fingers and toes. When studying equine anatomy, it’s often useful to draw comparisons to human anatomy. Though Evidence-Based Horsemanship delves deeply into equine brain anatomy, neurochemistry, and the nervous system, people can see just by looking at the horse’s brain how similar, and just how strikingly different, horses and humans are.. It is made up of the ilium, the ischium, and the pubis.At the junction of these three bones is a cavity called the acetabulum, which acts as the socket of the hip joint.The pelvic cavity is larger in diameter in the mare than in the stallion, providing more room for the foal during birth. Throughout time, the horse´s hoof has evolved to adapt to its environment, allowing horses to survive more easily in the places where they existed. “No hoof, no horse” is an adage that’s been around about as long as people have been riding and working horses. A significant difference between the horse skeleton and that of a human is the lack of a collarbone—the horse's forelimbs are attached to the spinal column by a powerful set of muscles, tendons, and ligaments that attach the shoulder blade to the torso. In comparison, the human brain … your own Pins on Pinterest Using the same two animals as a comparison, human hands and dog paws when seen side by side share the exact same bones in different places. The anatomy of craniovertebral junction bones of the tiger, horse, and deer was analyzed and compared with human bones. It has also been suggested in some species that the elastic nature of components of the hoof may aid the return of blood to the heart. . Know that you know the anatomy of your horses feet, why not learn the anatomy of the rest of the horse ? A horse’s hearing is similar in range and tone to that of humans. The horse’s brain is about the size of a large grapefruit and is proportionately 1/650 th of its body weight. Equine Skeletal System The horse skeleton averages 205 bones. In most species, foot lameness is traditionally linked to hoof deformity, and a set of molecular events have been defined in … Wild horses live in a different environment, and also natural selection produces a genetically different hoof than the selection made by man. Satisfactory investigations of the equine foot appear to be limited by the histo-morphological complexity of internal hoof structures. Discover (and save!) The evolutionary changes and structural alterations that have occurred due to the functional variations are clearly seen in the comparison. This entry was posted in Horse Basics on January 13, 2009 by The Equinest . The following information relates primarily to the horse hoof. Jul 29, 2018 - This Pin was discovered by Amy Connolley. Foot lameness is considered to be one of the most debilitating pathological disorders of the equine foot. 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