The Pregnant Body Book

An ideal reference for both medical students and prospective parents, The Pregnant Body Book looks at the nature of human pregnancy, including how it's changed through evolution, and explores the anatomy and physiology of both the reproductive systems. Examining the development of the baby in the womb and the parallel changes in the mother's body and structured to follow the process week by week, The Pregnant Body Book follows every anatomical and physiological change and tracks it in unprecedented detail. Specially commissioned 3D artworks, illustrations, scans, and photography show exactly how a baby changes and grows during pregnancy, and how the female body adapts to carry it.

THE COMPLETE ILLUSTRATED GUIDE FROM CONCEPTION TO BIRTH T T T T T T T T T T T T T T T T T T T H H H H H H H H H H H H H H H H H H H H E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C O O OO O O O O O O O O O O O O O O O O O M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P L L L L L L L L L L L E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E I I I I I I I I I I I I I L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L 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T T T T T T T T T T T T T T T T T T T T T O O O O O O O O O O O O O O O O O O O O O O O O O O B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R T T T H H H H H H H H H H H H H H H H H THE BOOK PREGNANT BODY [...]... “taken” from the mother’s skeleton to meet the demands of a newborn MUSCULAR SYSTEM The muscles enable the bones of the skeleton to move With the ligaments and tendons, they also work to maintain an upright posture The increasing weight of the fetus causes the mother's posture to change during pregnancy, placing extra strain on the muscles, ligaments, and joints in the lower back Also, many pregnant women... Relaxes in hot weather to keep testes cool and away from body; contracts when cold to prevent sperm from getting too cold Glans penis The bulbous end of the penis LAYERS OF THE SCROTUM The testes are surrounded by the layers of the scrotal wall: the outer skin, the muscular layer, the layers of connective tissue (fascia), and the innermost layer, the tunica vaginalis The testes are linked to the circulation... is when the eyes move to the front of the face (with the eyelids closed to protect the eyes), the ears move to their final positions, and the facial muscles develop By 22 weeks, the fetus’s eyebrows may be visible, and by 26 weeks it may have eyelashes By 27 weeks, the eyes open and there is hair on the head By the time the baby is born, its head is more in proportion to its body, although still as much... egg to achieve the right number of chromosomes Early spermatids ANATOMY OF THE SPERM Sperm are perhaps the tiniest cells in the body, yet they can propel themselves along and contain half the genetic information needed for a new individual to develop The head contains the nucleus and at the front the acrosome, which contains enzymes that help it penetrate an egg The midpiece contains the mitochondria,... sprouting, and the organs are developing From the tenth week, the grape-sized embryo is termed a “fetus.” And by 12 weeks, the fetus is fully formed Its body grows rapidly in the second trimester, such that its head and body approach the proportions of an adult By 14 weeks, its sex may be apparent The brain grows rapidly in the last few weeks of the second trimester By 30 weeks, in the third trimester, the fetus... press on the bladder MALE The human body can be divided into systems—groups of organs and tissues that work together to carry out a specific function or functions During pregnancy, many of these systems alter their size, structure, and even their function to meet the needs of the growing fetus Some of the changes are obvious, such as the rapidly expanding uterus and breasts Other changes, such as the massive... and the passageways that will become ears start developing on the side of the head at about the sixth week By the tenth week, the head has become rounder and the neck has started to develop In these early stages, the fetus is very top-heavy: at 11 weeks, for example, its head is half of its total body length The second trimester is a period of rapid development for the head and face This is when the. .. example, the shape of its face Eye The soft tissue of the eye appears black in the scan image, while the bone of the eye socket gives a white outline Nose The soft parts of the nose cannot be seen, but the bone structure around it appears white Mouth cavity This is seen as black Two heads The white outlines of the skulls indicate the two heads of twin fetuses This scan image cannot reveal if they are... have the potential to fertilize an egg and form new life The optimum temperature for sperm production is lower than body temperature, so the testes hang outside the body cavity in the scrotum Spermatogenesis is a gradual process, taking about 74 days from start to finish Development begins at the outer border of the tubule and continues as the cells divide and move toward the center of the tubule, the. .. weeks the image at the bottom right shows the toes of a 10-week-old fetus At nine weeks, the arms may develop bones and can bend at the elbow, and by 14 weeks the arms may already be the length that they will be when the baby is born Finer details such as fingerprints and footprints start forming around 23 weeks By 25 weeks, the hands are fully developed, and the fetus may use them to explore inside the . I I I I I I I I I I I I I L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L L U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S SS S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S T T T T TT T T T T T T T T T T T T R A A A A A A A A A A A A A A A T T T T T T T T T T T T T T T T T E E E E E E E E E E E E E E E E E E E E D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D . SYSTEM NERVOUS SYSTEM REPRODUCTIVE SYSTEM ENDOCRINE SYSTEM SKELETAL SYSTEM URINARY SYSTEM DIGESTIVE SYSTEM LYMPHATIC SYSTEM SKIN, HAIR, NAILS, AND TEETH CROWN–HEEL