The
penis consists of two parts: the fixed root or radix and the free corpus
or shaft.
The greatest part is formed by the corpus cavernosum. This is surrounded
by the corpus spongiosum. Vasodilation during sexual arousal causes
increased blood flow into both regions and restricts venous drainage.
The epididymis/ seminal vesicle, prostrate and bulbo - urethra gland
or Cowpers gland add fluid to the ejaculate.
| Reproductive Tracts of Male and Female | ||||||
| Female | ||||||
| + | Follicle | |||||
|
+
|
+ | Primary Follicle | ||||
|
+
|
+
|
+ | Hypotaxis | |||
|
+
|
+
|
+ | Follicle Growth | |||
|
+
|
+
|
+ | Menstrual Cycle | |||
|
+
|
+ | Secondary Follicle | ||||
|
+
|
+
|
+ | Gonad-Cell Theory | |||
|
Male |
||||||
|
+
|
Testis | |||||
|
+
|
+
|
Seminiferous Tubule | ||||
|
+
|
+
|
+
|
||||
|
+
|
+
|
+ | Mature Spermatozoan | |||
| + | Spermatogenesis | |||||
| + | Hypothalmic | |||||
| Fertilisation | ||||||
d