They combine with a third system, the immune, to protect the body against pathogens that could threaten the organism's viability. The blood is responsible for the following: 1  Transportation of gases (oxygen O 2) and carbon dioxide (CO 2), chemical substances (hormones, nutrients, salts), and cells that defend the body.hey combine with a third system, the immune, to protect the body against pathogens that could threaten the organism's viability. The blood is responsible for the following: 1  Transportation of gases (oxygen O 2) and carbon dioxide (CO 2), chemical substances (hormones, nutrients, salts), and cells that defend the body.
Myo-inositol in Pregnancy Purpose of the study is to learn if myo-inositol supplements (supplement in the B-vitamin family) affect your blood sugar and how your body processes food for energy. The Maternal-Fetal Medicine Research Unit is studying myo-inositol supplementation in pregnancy.
Uterus Size During Pregnancy: First Trimester. Around 12 weeks pregnant, the uterus is the size of a grapefruit and starts to grow up and out of the your pelvis, but still fits within it. If you are carrying twins or multiples, your uterus will start growing and stretching sooner. Your OB/GYN will be able to feel your uterus by touching your belly.