Difference between revisions of "Snake and Lizard Reproduction - Anatomy & Physiology"
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=== Phallus === | === Phallus === | ||
| + | |||
| + | * Paired hemipenes | ||
| + | * Stored in the base of the tail. | ||
| + | ** Visualised externally by bulges at the ventral proximal tail. | ||
| + | * Only one hemipene is used during copulation. | ||
| + | ** Erected by vascular engorgement and muscular action. | ||
| + | ** Everted to protrude through the cloaca. | ||
| + | * Sperm passes from the ductus deferens into the male urodeum. | ||
| + | * Sperm is then carried in a groove down the hemipene to be deposited in the female cloaca. | ||
== Female == | == Female == | ||
Revision as of 08:03, 25 July 2008
Lizards (Squamata)
Male
Testes
- Located cranial to the kidneys.
- Attached to the dorsal wall by a mesochorium.
- In some species, the kidney has a posterior sexual segment that becomes swollen during the breeding season and contributes to seminal fluid.
- Right testis lies cranial to the left.
- Intimately connected to the vena cava by short blood vessels.
- Left testis lies close to the adrenal gland.
- Has its own testicular blood vessels.
Phallus
- Paired hemipenes
- Stored in the base of the tail.
- Visualised externally by bulges at the ventral proximal tail.
- Only one hemipene is used during copulation.
- Erected by vascular engorgement and muscular action.
- Everted to protrude through the cloaca.
- Sperm passes from the ductus deferens into the male urodeum.
- Sperm is then carried in a groove down the hemipene to be deposited in the female cloaca.