Human Embryo Development Quiz

Crown-rump length = Measurement from the top of the head to the bottom of the buttocks Neural tube formation = Groove forms along middle back as cells thicken Tubular heart development = Begins during the third week of development Liver function initiation = Starts during early embryonic development

Cardiovascular system = Primitive red blood cells circulate through fetus and chorionic villi at 28 days Musculoskeletal system = Noticeable limb buds at 4 weeks Gastrointestinal system = Mouth formation and primitive jaws present at 5 weeks Endocrine system = Appearance of thyroid tissue

Respiratory system = Formation of nasal pits Genitourinary system = Initiation of kidney function Digestive tract = Stomach formation and tubular ducts of pancreas and liver forming at 4 weeks Visual system = Formation of optic cup and lens pit

<p>Length: 2mm C-R = 2-3 weeks Length: 4 – 6 mm C-R = 4 weeks Length: 8 mm C-R = 5 weeks Weight: only 0.4 g = 4 weeks</p> Signup and view all the answers

<p>Neural tube closure = Anterior portion closes to form brain, closure of poster end forms spinal cord at 4 weeks Nervous system groove formation = Long narrow channel forms along middle back as cells thicken Eyes development = Pigment in eyes and formation of auditory pit enclosed structure Ear development = Auditory pit is now an enclosed structure</p> Signup and view all the answers