Lipids
What you will learn What are lipids Structure and function of saturated and unsaturated fatty acids Types of lipids Role of lipids in the human body [Figure 1] Oil. Does it mix with water? No. Biologically, why is this important? Oil is a lipid. The property of chemically not being able to mix with water gives lipids some very […]
Viral STIs
How long does a viral STI last? This is the Human Papilloma Virus, which causes a viral STI. Viral STIs can be especially dangerous, as they cannot be cured. Once you get one, it’s yours for life. And also, it’s the person’s you give it to. Viral STIs STIs caused by viruses include genital herpes, hepatitis B, genital warts, and HIV/AIDS. […]
Bacterial STIs
[Figure 1] Single-celled organisms. Can they be dangerous? These are chlamydia. Innocent-looking single-celled organisms. But these bacteria can lead to painful and devastating consequences. Bacterial STIs Many STIs are caused by bacteria. Some of the most common bacterial STIs are chlamydia, gonorrhea, and syphilis. Bacterial STIs can be cured with antibiotics. Chlamydia Chlamydia is the most common STI in the United States. As shown in […]
STIs
[Figure 1] What does “safe sex” truly mean? “Safe Sex.” The thought of a sexually transmitted infection should be enough to make you think about and believe in this saying. Understanding Sexually Transmitted Infections A shocking statistic made headlines in 2008. A recent study had found that one in four teen girls in the U.S. had a […]
Adulthood
[Figure 1] Does getting older have to be a bad thing? Being older doesn’t necessarily mean being unable to do things and not enjoy life. These seniors look as if they thoroughly enjoy life. And some would say that life begins after all the children have moved out of the house. Adulthood and Aging Adulthood does […]
Birth to Adulthood
[Figure 1] What’s the main difference between an adorable little baby and a teenager? This quiet little baby will soon grow into someone who talks and expresses feelings and attitudes. What’s the main difference between an adorable little baby and a teenager? Plenty. From Birth to Adulthood For the first year after birth, a baby […]
Pregnancy
[Figure 1] Why is it called labor? So…the mother carries the developing baby for nine months. We know about the tremendous growth and development of the embryo and fetus. Then comes labor. Pregnancy and Childbirth Pregnancy is the carrying of one or more offspring from fertilization until birth. It is the development of an embryo and fetus from the expectant mother’s point of view. […]
The Placenta
[Figure 1] How does a developing baby breathe? Or eat? From mom, of course. Shown is a detailed representation of the placenta. And this is where all these interactions occur. Placenta and Related Structures The fetus could not grow and develop without oxygen and nutrients from the mother. Wastes from the fetus must also be removed in order for it […]
Prenatal Development
[Figure 1] What characterizes this fetus as human? The human fetus. Notice the details in the face and hands. Compare this to the human embryo, and the amount of growth and development is truly remarkable. Growth and Development of the Fetus From the end of the eighth week until birth, the developing human organism is referred to as a fetus. Birth typically […]
Embryo Growth
[Figure 1] At one time, did we really all look alike? We all start as a single cell and soon grow into an embryo. Notice the remarkable details beginning to form. The eyes, backbone, and limb buds are obvious. Think about the amazing complexity that must be going on inside the embryo, and the tremendous amount of growth and development still to […]
