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Oral Histology: Face Development

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Questions and Answers

What structures are formed from the ectoderm tissue folds during embryonic development?

Heart and brain

Jaws and neck structures (correct)

Lungs and liver

Hands and feet (correct)

During which week does the brain begin to develop in the embryo?

Fifth week

Third week

Fourth week (correct)

Sixth week

What forms the neural tube that will become the future spinal cord?

Neural groove surrounded by neural folds (correct)

Branchial arches developing in the mesenchyme

Neuroectoderm cells migrating from ectoderm

Oropharyngeal membrane and cloacal membrane

Which of the following structures is NOT developed from the endoderm tissue buds?

Ears Signup and view all the answers

What characterizes the growth of cells along the back of the embryo compared to the front?

They grow more rapidly, resulting in a curved shape. Signup and view all the answers

What is formed when the neural folds meet superior to the neural groove?

Neural tube Signup and view all the answers

What structures do the branchial arches develop into?

Jaws and neck structures Signup and view all the answers

During which week does the development of the nose begin with the formation of nasal pits?

Fifth week Signup and view all the answers

What crucial role do neural cells derived from the neuroectoderm play during development?

Development of head and neck structures Signup and view all the answers

What significant structure forms at the cephalic end of the embryonic disc?

Oropharyngeal membrane Signup and view all the answers

Study Notes

Oral Histology: Development of the Face

Fourth Week: Central nervous system (CNS) forms from ectoderm. Neuroectoderm forms a neural plate, extending from head to tail. The plate thickens and invaginates, forming the neural groove, which deepens and becomes surrounded by neural folds. These folds fuse, creating the neural tube. The superior portion of the tube will become the spinal cord.
Fourth Week (continued): The embryo's back grows faster than the front, creating a curved shape. The oropharyngeal membrane (future mouth) appears at the head end, and the cloacal membrane (future anus) is at the tail end.
Neural Crest Cells: Important for head and neck development, originating from neuroectoderm and migrating into surrounding tissues.
Fifth Week: Nose develops as nasal pits, jaws and ears form. Hands and feet develop. All major internal organs start developing. Ectoderm tissue folds connect at the front of the embryo to create the chest and abdominal cavity walls.

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Description

Explore the intricate process of facial development during the early weeks of embryonic life. This quiz focuses on the formation of key structures like the neural tube, oropharyngeal membrane, and the development of the nose, jaws, and ears. Test your knowledge of these critical stages in oral histology.