Fertilization: Fusion between egg and sperm'

1
Basic Concepts of animal development

• Fertilization Fusion between egg and sperm.
• Cleavage Rapid cell multiplication of zygote.
• Blastulation Ball of cells lined by blastoderm
  and enclosed with blastocoele cavity.
• Gastrulation Rapid cell movement of blastula
  cells leading to formation of germ layers
  ectoderm , mesoderm endoderm.
• Neurulation Formation of organ rudiment
  Formation of primitive organ rudiments.
• Organogenesis Formation of organs

2
Embryonic Development
3
(No Transcript)
4
Kinds of Embryo Axis

• Superior or cranial and inferior or caudal Used
  to determine the relationships to the head and
  tail respectively.
• Frontal or coronal section Any vertical plane
  that intersects the median plane at right angles
  and divides the body into front (anterior or
  ventral ) and back (posterior or dorsal).
• Sagital or mid-sagital section Any vertical
  plane passing through the body that is parallel
  to the median plan.
• Median plane This is imaginary vertical plane
  of the section that passes longitudinally through
  the body.
• Lateral and medial plane Refer to the
  structures that are respectively farther from or
  nearer to the median plane of the body.
• Transverse or horizontal section Any plane that
  is at right angles to both the median or coronal
  planes.

5
(No Transcript)