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The human body has a total of 206 bones, which are divided into three parts: the skull, the torso, and the limbs. They are distributed throughout the body, supporting the body, protecting the internal organs, and at the same time being supported by muscles for various activities. If there are no bones, the human body is a pile of meat, what else can be done?
All bones in the human body vary in shape and size, some are large, such as the tibia, humerus, etc., and some are small, such as the phalanges. In terms of shape, it can be roughly divided into five types: long bones, short bones, flat bones, irregular bones, and air-containing bones.
Flattened bones protect internal organs, such as the skull to protect the brain; The rod bone is responsible for bodily movements, such as the bones of the limbs, etc.
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What do you think you can do??
There are a total of 206 bones in the human state. Among them, there are 29 cranial grasp bones, 51 trunk bones, and 126 four femurs.
Because bones have different positions and functions in various parts of the human body, they are also known in various shapes, which are called long bones, short bones, flat bones, and irregular bones.
The long bones are long cylindrical, the longer section in the middle is called the backbone, and the two ends of the long bones are relatively expanded, which is called the epiphysis. The cavity inside the diaphysis is called the bone marrow cavity, and there is bone marrow inside. The bone marrow has a hematopoietic function.
The long bones are mostly distributed in four segments of buried limbs, such as the ulna, radius, femur, etc. Most of the short bones are cubes, such as the tarsal bones and carpal bones. The flat bones are mostly wide and flat, plate-like, such as the parietal bones of the skull and the shoulder blades.
Irregular bones are irregular in shape, such as vertebrae.
Bones are connected to each other mainly by joints. The larger joints in the human body include shoulder joints, elbow joints, radial joints, hip joints, knee joints, etc. Joints generally consist of articular surfaces, articular cavities, and joint capsule.
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Adults generally have 206 bones.
It is divided into skull, trunk bone, and limb bone.
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The human skeleton is composed of 206 bones, including 29 skulls, 51 trunk bones, and 126 limb bones.
There are about 639 muscles in the whole body. It is composed of about 6 billion muscle fibers, of which the longest muscle fiber is 60 centimeters, and the shortest is only about 1 millimeter.
Large muscles weigh 2,000 grams, while smaller muscles weigh only a few grams.
The average person's muscles make up 35-45% of their body weight. The total length of capillaries in the muscles can reach 100,000 kilometers, which can circle the earth two and a half times.
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The human skeleton is composed of 206 bones, including 29 skulls, 51 trunk bones, and 126 limb bones. The human skeleton does not fully mature until around the age of 25.
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