general/embryology-of-cardiovascular-system

Stage in heart development

Structures around the developing embryo

Vascular structures in the embryo

Fetal blood vessel bypassing the lungs

Cavity in the hearts of chordates

Vein in the human fetus

Circulatory system of fetuses

Structure during embryonic development

Veins that drain blood from the yolk sac and gut tube

Membranous sac attached to an embryo

Vein running from the placenta to the fetus

Precursor stage of the heart in embryos

Structure in the heart

Wall of tissue separating atria of human heart