Ocular embryology- opto

the embryo is the stage in human development from the first division of the zygote until about nine weeks after fertilization

• True

• False

• Neither true nor false

• None of the above

Single cell layer thick and proliferates forming a new outer transient layer of simple squamous epithelium called periderm cells and underlying proliferating layer called the basal layer

• Ectoderm

• Mesoderm

• endoderm

• None of the above

Gives rise to a loosely women tissue called mesenchym

• Ectoderm

• Mesoderm

• Endoderm

• None of the above

Inside layer

• Ectoderm

• Mesoderm

• Messenchyme

• Endoderm

8th cell stage-gastrulation

• 5th day

• 10th day

• 15th day

• 20th day

Ns tissue , skin, glands ( epithelium) and neural epithelium

• Ectoderm

• Mesoderm

• Endoderm

• Neuro ectoderm

Muscles and connective tissue, blood vessels and bones

• Ectoderm

• mesoderm

• Endoderm

• Neuroectoderm

Gut structures and some glandular tissue

• Ectoderm

• Mesoderm

• Endoderm

• Neuro ectoderm

Neural tube

• ectoderm

• Mesoderm

• Endoderm

• Neuroectoderm

anterior neural tube- neural ectoderm contains the

• Brain

• Spinal cord