2. Anagen:
Growth Phase - Approximately 85 percent of the hair on your head is in the
growing phase at any given time. This phase can last 2 to 6 years. Hair can
grow at the rate of approximately 5 inches per year and any individual hair is
unlikely to grow more than one yard long.
生長期 :
在我們頭上大約有 85% 頭髮屬於生長期階段,生長期階段時間為 2~6 年,生長
期階段頭髮每年成長 5 英吋 (12.7CM/ 年 ) ,簡單說頭髮生長時間大約 2~6 年。
0.013 英吋 / 天 x30 天 *2.54= 約 1.058 cm/ 月
0.013 英吋 / 天 x30 天 *2.54*12= 約 12.7 cm/ 年
3. Catagen:
When the Anagen growth phase comes to an end, hair enters into a Catagen
phase which lasts about one or two weeks. During this transitional phase, the
hair follicle shrinks to about 1/6th of the normal diameter. The "root" is
diminished and the dermal papilla breaks away and rests below the scalp.
退化期 :
生長期結束,頭髮將進入退化期,期間毛囊不在進行細胞分裂與毛髮製造,
毛囊細胞逐漸死亡,並逐漸往頭皮表面上移,時間大約維持 1~2 週,此時頭髮
毛囊會收縮約 1/6 ,我們頭上大約有 1% 頭髮屬於退化期階段。
4. 毛髮的生命週期
Telogen:
Resting Phase. This period can last six to seven weeks. Although the hair does
not grow during this stage, At the end of this stage,the hair follicle re-enters
the growth phase.In some cases,the new hair will push The old hair out of the
way and the hair growth cycle starts all over again.
休止期 :
休止期階段頭髮已經完全停止生長,舊頭髮即將掉落,毛囊也正開始長出新的
頭髮,休止期大約約 6~7 週不等,我們頭上大約有 15% 頭髮屬於休止期階段。
休止期
Resting Phase