Dogs may be the most artificially bred breed in the world and the animals with the largest body differences. Their physique differences can reach more than 20 times. But with such a huge size difference, it is surprising that the skeleton structure...
Dogs may be the most artificially bred breed in the world and the animals with the largest body differences. Their physique differences can reach more than 20 times. But with such a huge size difference, it is surprising that the skeleton structure of dogs is basically the same. There are 206 bones in adults, and dogs have more bones than humans, with a total of 225-230 pieces, divided into skull, trunk bone and limb bone.
[The function of bones]: For vertebrates, bones are the hardest tissue in the body. The dog's bones support their body, maintain the dog's body shape, protect internal organs, and provide an attachment environment for muscles. These are all things we can think of through observation. But bones still have some functions, you may not have thought that they are also the hematopoietic organ in the body just now.
[Hematopoietic function]: Not all bones have hematopoietic function, because not all bones contain bone marrow. Only hematopoietic stem cells in the bone marrow can divide red blood cells, white blood cells and platelets.
【Protect the Bone Marrow】: The spinal cord is an important part of the nervous system. Like humans, many of the commands issued by the brain to the limbs must be transmitted through the spinal cord, which is wrapped in the spinal cord. If there is a problem with the spinal cord (cervical vertebra, thoracic vertebra, and lumbar vertebra), the dog's body will have major problems.
1. The way of bone movement
The bone is a bone lever system that is driven by muscles attached to the bone nodes. The bone and the bone are connected at the joints with buffering effects. The complex structure of the bone makes the dog quite stable and mobility. The bone is maintained by ligaments, causing the dog to move to a certain extent in a specific direction.
And there is also! Every joint is surrounded by a joint capsule, and there is lubricant in the capsule, called synovial fluid. Cartilage is applied to the bone ends inside the joint, a smooth surface layer that helps the joint move lightly and buffers the weight load throughout the body.
Therefore, the growth and protection of joints should be taken seriously. Joint health care products should be supplemented reasonably during the childhood and when the dog's exercise increases.
2. Bone growth and development
Junior period: The long bones appear in the form of cartilage during the fetus. In the late stages of pregnancy, these cartilages gradually transform into real bones.
Adult: Once the dog stops growing, the periosteum becomes relatively inactive, but if a fracture occurs and regeneration is required, the periosteum in those areas becomes active again.
Nutrition maintenance: Bone growth requires nutrients, and each bone body is supplied with nutrients by two large nutrient arteries.
