ClipArt ETC
The abdominal and thoracic viscera of a five months fetus. The large liver and large size if its left lobe at this age should be noted.

Abdomen of Fetus

The abdominal and thoracic viscera of a five months fetus. The large liver and large size if its left…

"The innermost one of the membranes which envelop the embryo of the higher vertebrates,as mammals, birds, and reptile." -Whitney, 1902

Amnion

"The innermost one of the membranes which envelop the embryo of the higher vertebrates,as mammals, birds,…

Human fetus in the third month of development, with the brain and spinal cord exposed from behind.

Brain and Spinal Cord of Fetus

Human fetus in the third month of development, with the brain and spinal cord exposed from behind.

Diagram of fetal circulation.

Diagram of Fetal Circulation

Diagram of fetal circulation.

"Early Human Embryo, giving diagrammatically the principal vessels antecedent to the establishment of the regular fetal circulation. H, heart; P, lungs; L, liver; T A, the aortic trunk or cardiac aorta; c, c', c", common, external, and internal carotids; s, subclavian artery; v, vertebral artery; 1, 2, 3, 4, 5, the aortic arches (the persistent left aortic arch hidden); A, subvertebral aorta; o, o', omphalomeseraic artery and vein, to and from U, the umbilical vesicle with its vitelline duct, dv; u, u, the two hypogastric or umbilical arteries, with the ramifications, u", u", in the placenta; u', umbilical vein; vh, hepatic vein; cv, inferior vena cava; vil, iliac veins; az, an azygous vein; vc, a posterior cardinal vein; vi, innominate vein; vp, portal vein; Dv, the ductus venosus; DC, a ductus Cuvieri. The anterior cardinal vein is seen beginning in the head and running down to the ductus Cuvieri, on the under side of the numbers 1, 2, 3, 4, 5." -Whitney, 1911

Human Embryo

"Early Human Embryo, giving diagrammatically the principal vessels antecedent to the establishment of…

Fetal heart in successive stages of development. 1, venous extremity; 2, arterial extremity; 3, pulmonary branches; 4, ductus arteriosus.

Fetal Heart in Successive Stages of Development

Fetal heart in successive stages of development. 1, venous extremity; 2, arterial extremity; 3, pulmonary…