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- Creators: Arizona Board of Regents
- Member of: Embryo Project Encyclopedia Images
![](https://d1rbsgppyrdqq4.cloudfront.net/s3fs-public/styles/width_400/public/embryo/1_OImageSpermCapKK.jpg?versionId=SCH.FpIo92_wdPXGPZ6_gnWN7vJrNlMi&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIASBVQ3ZQ42ZLA5CUJ/20240613/us-west-2/s3/aws4_request&X-Amz-Date=20240613T114524Z&X-Amz-SignedHeaders=host&X-Amz-Expires=120&X-Amz-Signature=2f3ec0e743f7bf52c7fbad814ce93b77a7921e62bef79f40a400ea1905abdafb&itok=rM50FX7E)
The male body, followed by male reproductive organs from which the sperm originates, is depicted from top to bottom at the left. Under the male reproductive organs is a diagram of a single sperm. To the right of the sperm diagram, the physiological and morphological changes a sperm undergoes to fertilize an egg are depicted from left to right. Each change is associated with a light pink rectangle background. Each light pink rectangle corresponds to the location of the sperm within the female reproductive organs, which is depicted above it. In addition, a molecular view of each change is directly under each light pink rectangle.
It is important to note the background color of the illustration. A blue to purple gradient depicts the two phases of sperm capacitation: sperm capacitation is in blue, and the acrosome reaction is in purple. It is still unclear where the two phases differentiate and thus a gradient is used as opposed to two distinct colors. The title location for each phase designates the approximate start of each phase.
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