What is a scapula ?
Ruminant (grass eating mammal) scapulasRuminants are the group of mammals that eat greenery and have a stomach that is in four parts. They usually eat grass or other plants, chew it a bit, swallow, then later bring it up and chew some more. They do this because they can't properly digest it in one go. The ruminant scapulas I have are red deer, roe deer and sheep.
Seal scapulasThe seal is a lot different from the ruminants. It isn't a triangle at all, but almost like a circle with a bite taken out of it. There aren't really any straight lines at all. The sheep and deer scapulas had the ridge almost at the left hand edge, but this one is almost in the middle.
Medium-sized mammal scapulas
Small mammal scapulas
Both hedgehog and squirrel scapulas have a special bit of bone which comes off the middle ridge of scapula and hangs over the socket. The cat scapula had this as well. It is called the acromion and it is on the scapula of animals that have collarbones (or clavicles). Humans have clavicles, which are thin bones that go across the top of the chest from the shoulder to the top of the sternum (front of the ribcage). Animals that have clavicles are those that need to grip their arms together as it helps hold the scapula in place. But for animals that need to run fast and move the scapula fast, it isn't a good idea as it would restrict the movement. That's why hedgehogs and squirrels have them but rabbits and deer don't.
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