由结缔组织和弹力纤维构成

The corium is under the epidermis, it's made up of connective tissue that contains collagenous fiber, elastic fiber, reticular fiber and ground substance between fasciculus, it's very important for the elasticity and lusty of the skin, malnutrition, ageing and long-time excessive exposure to the sun would all lead to wrinkles and sagging of the skin, the reason of this is denature or fracture of collagenous fiber and elastic fiber.

真皮在表皮之下，由胶原纤维、弹力纤维和网状纤维组成的结缔组织，与纤维束间的无定形基质构成，对皮肤的弹性光泽和弹力等有着重要作用，营养不良、衰老或长期过度日晒会使皮肤发生皱纹、弹性松弛，是胶原纤维及弹力纤维变性或断裂的结果。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。