Embryology and Anatomy of Development

From the study guide

Course Outline

  1. Embryonic development and fertilization
  2. Placentation and placental barriers
  3. Thoracic cavity and mediastinum
  4. Pharyngeal arches and tongue development
  5. Salivary glands and oral anatomy
  6. Horse teeth and temporomandibular joint
  7. Larynx and vocal cavity
  8. Pancreas and fetal vasculature
  9. Urogenital anatomy and bird respiration
  10. Eye anatomy and visual structures
  11. Ear anatomy and hearing
  12. Spinal cord and cranial nerves

1. Embryonic development and fertilization

Key Concepts & Definitions

  • Embryonic development: Embryonic development is the series of processes where a fertilized egg forms an embryo, then a fetus capable of adapting to postnatal life.
  • Embryonic period: The embryonic period is the phase during which the major organ systems are established.
  • Fertilization site: The fertilization site is the location where sperm contact the oocyte, mainly the ampullary region of the oviduct.
  • Zona pellucida: The zona pellucida is the oocyte covering the fertilizing sperm must interact with during the first steps of fertilization.
  • Polyspermy block: The polyspermy block is the cortical response after gamete fusion that prevents further sperm from entering the oocyte.

Essential Points

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Practice quiz preview

1. Which sequence correctly describes the afferent visual pathway from the retina to the visual cortex?

2. Which nutrient source is provided by uterine gland secretion before full placental exchange is established?

3. Which feature best describes the teeth of an adult horse?

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Flashcard preview

Embryonic development — definition?

Process from fertilization to organ formation.

Embryonic period — focus?

Major organ systems are established.

Fertilization site — main location?

Ampullary region of the oviduct.

Zona pellucida — role?

Sperm interacts with it during fertilization.

Polyspermy block — purpose?

Prevents multiple sperm entry into oocyte.

First division — time after ovulation?

Approximately 24 hours.

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