The Hoof
1) Digital flexor tendon. (2) Sesamoidean ligament. (3) Digital extensor tendon. (4) Long pastern bone. (5) Short pastern bone. (6) Coronary corium. (7) Pedal bone. (8) Laminar corium. (9) Wall. (10) White line. (11) Sole. (12) Plantar cushion. (13) Navicular bone.

(1) Insensitive laminae. (2) Sensitive laminae. (3) Laminar corium.

(1) Bulb of heel. (2) Bar. (3) Sole. (4)Ground border of wall. (5) Toe. (6) White line. (7) Of Frog A. Central groove. B. Ridge. C. Lateral groove. D. Apex.

The horseís foot is completely surrounded by a substance similar to a humanís finger nail to protect it against having to sustain the wear and tear of carrying one quarter of the horseís foot consists of an outer layer of horn (hoof) inside which is contained the pedal and navicular bones, part of the second phalanx and the deep digital flexor tendon, the end of which is attached to the pedal bone. The foot also contains the digital pad, lateral cartilages, corono-pedal joint , blood vessels and nerves. The outer layer consists of the walls; sole, bars and frog. The hoof is an inert substance composed largely of keratin which is secreted by the coronary corium. The hoof grows at a rate of approximately 0.5 cm (0.2 in) per month and it receives nourishment from the sensitive laminae leaf-like structures which line the pedal bone and which bind the hoof to the bone as they interlock with comparable leaves from the insensitive laminae of the hoof. The foot as a whole absorbs concussion and by its continuous growth it is able to replace the surface as this is lost by every day wear and tear.

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