Extras

    Video thumbnail: Science Trek The Heart: Heart Q&A

    Science Trek

    The Heart: Heart Q&A

    Learn more about the blood your heart pumps.

    The Heart: Heart Q&A

    Video thumbnail: Science Trek The Heart: Blood Q&A

    Science Trek

    The Heart: Blood Q&A

    Dr. Agoudemous answers students' questions about blood.

    The Heart: Blood Q&A