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阴茎
学习目标
完成本学习单元后，你将掌握：
- 了解阴茎的方位。
- 识别阴茎的组成部分及海绵体组织。
- 识别阴茎的肌肉及筋膜。
浏览图谱
阴茎是男性外生殖器，具有生殖和泌尿系统的双重功能。阴茎通过勃起以辅助性交，作为精液排出的通道，并辅助尿液从膀胱排出体外。
由近至远，阴茎分为根、体和头三部分。阴茎由三条海绵体组成：两条阴茎海绵体和一条位于正中的尿道海绵体。
- 阴茎根由阴茎球（尿道海绵体近端膨大）和阴茎脚（阴茎海绵体近端变细并固定在耻骨下支和坐骨支）组成，分别由球海绵体肌和坐骨海绵体肌包绕。
- 阴茎体由位于前方的尿道海绵体（内含尿道）游离部和位于后外侧的阴茎海绵体组成。
- 阴茎头即尿道海绵体远端膨大。
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阴茎球
Bulb of penis
1/15
同义词：
尿道球
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阴茎球
Bulb of penis
1/14
同义词：
尿道球
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/cavernous-body-of-penis-4/v4E88pn3p3vKbE8pEZRJYA_cavernous-body-of-penis-4(2).jpg "阴茎海绵体 (Corpus cavernosum of penis)；图像：Paul Kim"){kind=logo}
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阴茎海绵体
Corpus cavernosum of penis
1/7
同义词：
阴茎勃起组织
进行测验
快来参加小测验，巩固你的知识吧！
小结
| 组成 |
阴茎根：阴茎球、阴茎脚、坐骨海绵体肌、球海绵体肌 阴茎体：阴茎海绵体和尿道海绵体的远侧部 阴茎头：阴茎颈和阴茎头冠 |
| 海绵体 | 2条阴茎海绵体 1条尿道海绵体 |
| 筋膜 | 白膜 阴茎深筋膜(Buck筋膜) 阴茎浅筋膜 (Colles筋膜) |
| 韧带 | 阴茎悬韧带和阴茎系韧带 |
| 主要作用 |
生殖功能：通过勃起以辅助性交 泌尿功能：使尿液从膀胱排出体外 |
继续学习
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