Fingertips have thick skin, thick cuticle and fat pad under the skin, and there are many vertical fiber intervals, which connect the skin with deep tissues such as phalanges and tendon sheaths. In addition, the distal interphalangeal joint has a fiber space under the transverse stripes, which makes the fingertip become a closed gap, which can avoid skin sliding, meet the need of direct contact with objects during grasping and pinching, and keep the grip stable. Finger skin is rich in sweat glands, but there is no hair and no sebaceous glands. The narrow sense of finger pulp refers to the ventral part of the finger distal segment.

Extended data:

The relationship between fingers and health

Fingers are indeed inextricably linked with the heart. Not long ago, scientists at the University of Liverpool in the UK discovered for the first time that there is a direct relationship between finger length, age and heart disease. By looking at boys' fingers, you can know whether they are at risk of heart disease when they grow up. Scientists at the University of Liverpool came to this conclusion after studying heart disease patients of different ages.

Reference source; Baidu encyclopedia-finger abdomen