Human reproduction

Internal fertilization followed by embryo development

SEXUAL

Choose an organism, then press Start narrated lesson.

1. Choose a living thing

2. Follow the process

Playback & conditions

Simulation speed1.0×

Gamete health80%

No object focused
Tap a moving cell or structure to track it.

Camera

Magnification1.0×

Show closed captions Teacher / Demo mode

Learning objectives

Distinguish sexual and asexual reproduction.
Trace how reproductive cells or nuclei move.
Identify fertilization, budding and offspring formation.
Compare internal and external fertilization.

Key ideas

Sexual reproduction combines genetic information from two gametes. Asexual reproduction uses one parent and usually produces genetically similar offspring.

Try this

Lower gamete health and compare movement.
Pause during fertilization and track a cell.
Compare frog external fertilization with human internal fertilization.

7-question quiz

Score: 0 / 7