AP PSYCHOLOGY

Detailed explanation-1: -Week 5 is the start of the “embryonic period.” This is when all the baby’s major systems and structures develop. The embryo’s cells multiply and start to take on specific functions. This is called differentiation.

Detailed explanation-2: -Month 2 (weeks 5 through 8) Fingers, toes and eyes are also forming. The neural tube (brain, spinal cord and other neural tissue of the central nervous system) is well formed now. The digestive tract and sensory organs begin to develop too.

Detailed explanation-3: -Almost all organs are completely formed by about 10 weeks after fertilization (which equals 12 weeks of pregnancy). The exceptions are the brain and spinal cord, which continue to form and develop throughout pregnancy.

Detailed explanation-4: -In week 5, the brain and spinal column are already starting to form. The spinal cord is called the neural tube and is developing as an open groove. Your baby’s head is much larger than the rest of the body at this stage as the brain and face are developing very rapidly. Your baby’s heart will start beating this week.