Briefly describe how these skulls are similar and different.

Human Anatomy & Physiology (11th Edition)
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Briefly describe how these skulls are similar and different.
### Sexual Dimorphism in Gorilla Skulls

Gorillas exhibit significant **sexual dimorphism** in their skull features. This means that the skulls of male and female gorillas have distinct differences, which can be observed in certain anatomical features:

- **Female Gorilla Skulls:**
  - **Smaller Size:** Female gorilla skulls are generally smaller compared to those of males.
  - **Sagittal Crest:** They have a very small sagittal crest, which is a ridge of bone running lengthwise along the midline of the top of the skull.
  - **Nuchal Crest:** The nuchal crest, located at the back of the skull, is small.

- **Male Gorilla Skulls:**
  - **Larger Size:** Male gorilla skulls are larger than female skulls.
  - **Sagittal Crest:** Males possess a large sagittal crest, which is more pronounced than in females.
  - **Nuchal Crest:** The nuchal crest is also large, providing more area for the attachment of strong neck muscles.

These variations in skull structure are essential for understanding the physical adaptations and behaviors of gorillas.

_Photo courtesy of SkullsUnlimited.com_
Transcribed Image Text:### Sexual Dimorphism in Gorilla Skulls Gorillas exhibit significant **sexual dimorphism** in their skull features. This means that the skulls of male and female gorillas have distinct differences, which can be observed in certain anatomical features: - **Female Gorilla Skulls:** - **Smaller Size:** Female gorilla skulls are generally smaller compared to those of males. - **Sagittal Crest:** They have a very small sagittal crest, which is a ridge of bone running lengthwise along the midline of the top of the skull. - **Nuchal Crest:** The nuchal crest, located at the back of the skull, is small. - **Male Gorilla Skulls:** - **Larger Size:** Male gorilla skulls are larger than female skulls. - **Sagittal Crest:** Males possess a large sagittal crest, which is more pronounced than in females. - **Nuchal Crest:** The nuchal crest is also large, providing more area for the attachment of strong neck muscles. These variations in skull structure are essential for understanding the physical adaptations and behaviors of gorillas. _Photo courtesy of SkullsUnlimited.com_
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