Critical thinking is the ability to think clearly and rationally about what to do or what to believe. It includes the ability to engage in reflective and independent thinking. Someone with critical thinking skills is able to do the following 1  : understand the logical connections between ideas.  identify, construct and evaluate arguments.
Not Medical Advice: The uterus (which is continuous with the cervix) weighs 2.5 ounces (70 g) on average. It is a mostly solid, although hollow and composed of smooth muscle. It is pear-shaped, and typically measures 3 inches (7.6 cm) in length.
In this image, you can see the beginnings of the placenta in the uterus. The embryo is about 1/4 inch to 1/2 inch long and weighs 1/1,000th of an ounce. The embryoâs head is large in proportion to the rest of the body. The internal organs are forming and the heart has been beating since the end of the 4th week.