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Period: to
Zygote
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Period: to
Embryo
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Heart beats regularly. Eyes and ears begin to form.
A 4 week old embryo's heart beats regularly. Its eyes and ears begin to form. -
Heart develops right and left chambers.
About 2 months after it becomes a zygote, an embryo's hearrt develops right and left chambers. -
Period: to
Fetus
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Bones are visible. Heartbeat can be heard with a stethoscope.
4 to 6 months after conception, a fetus's bones are visible, and its heart can be heard with a stethoscope. -
Fingerprints form.
A 6 month old fetus's fingerprints start to form. -
Eyelids can open and weight can be up to 6.6 pounds.
A fetus between 6 and 9 months after conception can weigh 2.2 pounds. At that age, its eyelids can open. Stockarch, . eye2314. morgueFile. Web. 17 Feb. 2012.
http://www.morguefile.com/archive/display/610540. -
Period: to
Infancy
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A baby can hold its head up and reach for objects.
About 3 months after birth, an infant can hold up its head and reach for objects. -
Infant begins to crawl.
At around 7 months, infants begin crawling. MacKay, C C. Picture_015_q. morgueFile. Web. 1 Jan. http://www.morguefile.com/archive/display/132100. -
Period: to
Childhood
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First Day of Kindergarten
I began kindergarten on August 11, 2004. I was very nervous, but I was also excited. Kindergarten was a very important year in school for me. I made more friends and learned how to read and write. -
I started soccer.
I started playing soccer in spring of 2005, when I was 5. I was nervous about soccer, but I was excited to be starting a sport. I have played soccer since then. I enjoyed learning to play soccer. -
I got a dog.
I got a dog in early 2005. This was a significant point in my life because having a dog taught me responsibility. I had been asking for a dog for at least a year. I was very excited to finally have my dog. -
Ovulation in females, and sperm production in males, begins.
Girls between the ages of 9 and 15, like the girl in this picture, begin ovulation. Males in that age range begin producing sperm. -
Period: to
Puberty
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I competed in my first horse show.
I competed in my first horse show in 2008, when I was 9. Competing made me excited and worried. Although I had just started riding, I got second place in my group. It was very special to me to be able to compete in the show, although I was not very good at riding. -
My best friend moved.
My best friend moved to Mississippi in July of 2010. We were friends from kindergarten to 5th grade. She had to move because her mom got remarried. When she left, I lost one of the only friends I had. -
Period: to
Adolescence
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Period: to
Adulthood
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Skin starts to become wrinkled.
Around age 30, people's skin starts to show wrinkles. -
Aging begins.
Around age 30, aging begins to be visible. -
Aging becomes more noticable and progresses rapidly.
Between the ages of 45 and 60, aging becomes more noticeable, progressing rapidly.
