Endoscopic image of the human embryo in vivo after 4 weeks, showing the retina of the eye (dark spot)- after another week the lens and cornea will for

---

Endoscopic image of the human embryo in vivo after 4 weeks, showing the retina of the eye (dark spot)- after another week the lens and cornea will form in front of it. To the left is the developing brain, while the heart (at this stage a simple, curved tube) appears bulging out of the body on the lower left. A paddle- like hand extends at the bottom of the image. The endoscope, a series of lenses and a fibre- optic light source, is inserted through the cervix and manipulated until a \window\" into the amniotic sac is found (an area where the amniotic wall is thinner)."

---

Size: 3827px × 2480px
Photo credit: © ALEXANDER TSIARAS/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: adult, ankle, arthrology, bearing, caucasian, close-, detail, equipment, exercise, exercising, feet, gym, healthcare, hip, human, injured, injury, joint, leg, machine, male, man, medical, medicine, patient, people, person, physio, physiotherapy, recovery, rehabilitating, rehabilitation, room, studio, therapy, treadmill, treatment, walking, weight, white